APA (7e ed.) Bronvermelding

Roberts, P. (1970). The Roberts English series: A linguistics program. Harcourt, Brace & World.

Chicago (17e ed.) Bronvermelding

Roberts, Paul. The Roberts English Series: A Linguistics Program. New York ; Chicago [etc.]: Harcourt, Brace & World, 1970.

MLA (8e ed.) Bronvermelding

Roberts, Paul. The Roberts English Series: A Linguistics Program. Harcourt, Brace & World, 1970.