Gaya APA

Yojani, R, S, P, &, F, R. (2006). Student's Book Smile for Elementary School Sixth Grade (6) . Jakarta: Erlangga.

Gaya MLA

Yojani, Ratna, Setyowati, Putri, &, Fidelia, Ratri. "Student's Book Smile for Elementary School Sixth Grade (6)". Jakarta: Erlangga, 2006. Text.