Gaya APA

Aryulina,dkk,, D. (2009). Let's Study Prepositions (Mari Belajar Preposisi) . : PT Citra Aji Parama.

Gaya MLA

Aryulina,dkk,, Diah. "Let's Study Prepositions (Mari Belajar Preposisi)". : PT Citra Aji Parama, 2009. .