APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (8:e uppl.)

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