Cita APA

Roberts, P. 1., & Roberts, P. 1. (1962). English sentences. New York, New York: Harcourt Brace and World.

Citación estilo Chicago

Roberts, Paul 1917-1967, y Paul 1917-1967 Roberts. English Sentences. New York, New York: Harcourt Brace and World, 1962.

Cita MLA

Roberts, Paul 1917-1967, y Paul 1917-1967 Roberts. English Sentences. New York, New York: Harcourt Brace and World, 1962.