Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

Warning: These citations may not always be 100% accurate.