APA Style

Pulungan, S, E, L. (2001). Let's Make Friends With English 2, for Elementary School Grade Two . : Esis, Erlangga.

MLA Style

Pulungan, Siti, Eryda, Lubis. "Let's Make Friends With English 2, for Elementary School Grade Two". : Esis, Erlangga, 2001. BOOK.