Gaya APA

Collie, J., Slater, S. (2005). Speaking 2 ; Students Book (Cet.05). Yogyakarta: Kanisius.

Gaya MLA

Collie, Joanne., Slater, Stephen. "Speaking 2 ; Students Book". Cet.05 Yogyakarta: Kanisius, 2005. Text.