APA Style

Akhmadi, A., Safrida, I. (2007). Smart steps: the smartest way to learn English (cet. 1). Jakarta: Geneca Exact.

MLA Style

Akhmadi, Ali., Safrida, Ida. "Smart steps: the smartest way to learn English". cet. 1 Jakarta: Geneca Exact, 2007. Buku SMP Athalia.