Gaya APA

Dwijatmoko, B. (1990). Communicative grammar practice for first year english departement university studen (1). Yogyakarta: Kanisius.

Gaya MLA

Dwijatmoko, B.B.. "Communicative grammar practice for first year english departement university studen". 1 Yogyakarta: Kanisius, 1990. Text.