Gaya APA

ALEXANDER, L. (1990). Practice and Progress: An integrated Course for pre intermedikte Students / L.G. Alexander (Cet.7). : Longman.

Gaya MLA

ALEXANDER, L.G.. "Practice and Progress: An integrated Course for pre intermedikte Students / L.G. Alexander". Cet.7 : Longman, 1990. Referensi.