APA Style

Yojani, R, S, P, F, R. (2006). Student`s Book Smile For Elementary School 6 . Jakarta: Erlangga group.

MLA Style

Yojani, Ratna, Setyowati, Putri,, Fidelia, Ratri. "Student`s Book Smile For Elementary School 6". Jakarta: Erlangga group, 2006. Text.