APA (7th ed.) Citation

Roberts, P. (1968). The Roberts English series: A linguistics program (Teacher's ed.). Harcourt, Brace & World.

Chicago Style (17th ed.) Citation

Roberts, Paul. The Roberts English Series: A Linguistics Program. Teacher's ed. New York: Harcourt, Brace & World, 1968.

MLA (9th ed.) Citation

Roberts, Paul. The Roberts English Series: A Linguistics Program. Teacher's ed. Harcourt, Brace & World, 1968.