APA (7e ed.) Bronvermelding

LUBIS, Y. (1988). Developing communicative proficiency in the english asa foreign language (EFL) class. Depdikbud.

Chicago (17e ed.) Bronvermelding

LUBIS, Yusnaini. Developing Communicative Proficiency in the English Asa Foreign Language (EFL) Class. Jakarta: Depdikbud, 1988.

MLA (9e ed.) Bronvermelding

LUBIS, Yusnaini. Developing Communicative Proficiency in the English Asa Foreign Language (EFL) Class. Depdikbud, 1988.

Let op: Deze citaties zijn niet altijd 100% accuraat.