diff --git a/CocktailSort.go b/CocktailSort.go
new file mode 100644
index 0000000..9614a22
--- /dev/null
+++ b/CocktailSort.go
@@ -0,0 +1,123 @@
+package main
+
+import "fmt"
+import "math/rand"
+import "time"
+
+type Interface interface {
+	Len() int
+	Less(i, j int) bool
+	Equal(i, j int) bool
+	Swap(i, j int)
+}
+
+type IntArr []int
+func (IA IntArr) Len() int { return len(IA) }
+func (IA IntArr) Less(x, y int) bool { return IA[x] < IA[y] } 
+func (IA IntArr) Equal(x, y int) bool { return IA[x] == IA[y] }
+func (IA IntArr) Swap(x int, y int) { IA[x], IA[y] = IA[y], IA[x] }
+
+type StringArr []string
+func (SA StringArr) Len() int { return len(SA) }
+func (SA StringArr) Less(x, y int) bool { return SA[x] < SA[y] } 
+func (SA StringArr) Equal(x, y int) bool { return SA[x] == SA[y] }
+func (SA StringArr) Swap(x int, y int) { SA[x], SA[y] = SA[y], SA[x] }
+
+type Float32Arr []float32
+func (F32A Float32Arr) Len() int { return len(F32A) }
+func (F32A Float32Arr) Less(x, y int) bool { return F32A[x] < F32A[y] } 
+func (F32A Float32Arr) Equal(x, y int) bool { return F32A[x] == F32A[y] }
+func (F32A Float32Arr) Swap(x int, y int) { F32A[x], F32A[y] = F32A[y], F32A[x] }
+
+type Float64Arr []float64
+func (F64A Float64Arr) Len() int { return len(F64A) }
+func (F64A Float64Arr) Less(x, y int) bool { return F64A[x] < F64A[y] } 
+func (F64A Float64Arr) Equal(x, y int) bool { return F64A[x] == F64A[y] }
+func (F64A Float64Arr) Swap(x int, y int) { F64A[x], F64A[y] = F64A[y], F64A[x] }
+
+func CocktailSort(data Interface) {
+	last := data.Len() - 1
+	for {
+		swapped := false
+		for i:=0; i<last; i++ {
+			if data.Less(i+1, i) {
+				data.Swap(i+1, i)
+				swapped = true
+			}
+		}
+		if swapped == false {
+			return
+		}
+		
+		swapped = false
+		for i:=last-1; i>=0; i-- {
+			if data.Less(i+1, i) {
+				data.Swap(i+1, i)
+				swapped = true 
+			} 
+		}
+		if swapped == false {
+			return 
+		}
+	}
+}
+
+func main(){
+	IntSlice := make(IntArr, 12)
+	fmt.Print("Awal : ")
+	for i:=0; i<12; i++ {
+		rand.Seed(time.Now().UTC().UnixNano())
+		IntSlice[i] = rand.Intn(50)
+		fmt.Print(IntSlice[i], " ")
+	}
+	fmt.Println()
+	CocktailSort(IntSlice)
+	fmt.Print("Sesudah Sorting : ")
+	for i:=0; i<12; i++ {
+		fmt.Print(IntSlice[i], " ")
+	}
+	fmt.Println("\n")
+	
+	StringSlice := StringArr{"nama", "saya", "adalah", "alvreda", "ivena"}
+	fmt.Print("Awal : ")
+	for i:=0; i<5; i++ {
+		fmt.Print(StringSlice[i], " ")
+	}
+	fmt.Println()
+	CocktailSort(StringSlice)
+	fmt.Print("Sesudah Sorting : ")
+	for i:=0; i<5; i++ {
+		fmt.Print(StringSlice[i], " ")
+	}
+	fmt.Println("\n")
+	
+	Float32Slice := make(Float32Arr, 6)
+	fmt.Print("Awal : ")
+	for i:=0; i<6; i++ {
+		rand.Seed(time.Now().UTC().UnixNano())
+		Float32Slice[i] = rand.Float32()
+		fmt.Print(Float32Slice[i], " ")
+	}
+	fmt.Println()
+	CocktailSort(Float32Slice)
+	fmt.Print("Sesudah Sorting : ")
+	for i:=0; i<6; i++ {
+		fmt.Print(Float32Slice[i], " ")
+	}
+	fmt.Println("\n")
+	
+	Float64Slice := make(Float64Arr, 6)
+	fmt.Print("Awal : ")
+	for i:=0; i<6; i++ {
+		rand.Seed(time.Now().UTC().UnixNano())
+		Float64Slice[i] = rand.Float64()
+		fmt.Print(Float64Slice[i], " ")
+	}
+	fmt.Println()
+	CocktailSort(Float64Slice)
+	fmt.Print("Sesudah Sorting : ")
+	for i:=0; i<6; i++ {
+		fmt.Print(Float64Slice[i], " ")
+	}
+	fmt.Println()
+}
diff --git a/README.md b/README.md
index d48491d..eb06177 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ ChangeLog:
 * 2014-09-22 added SliceDeque (Rizal)
 * 2014-10-02 added LinkBST (Dikaimin)
 * 2014-12-11 added QuickSort, CombSort, Heapsort (Agung)
+* 2014-12-11 added CocktailSort (Alvreda)
 
 TODO:
 =====