Roberts, P. (1962). English sentences. Harcourt, Brace and World.
Cita Chicago Style (17a ed.)Roberts, Paul. English Sentences. New York, Estados Unidos: Harcourt, Brace and World, 1962.
Cita MLA (9a ed.)Roberts, Paul. English Sentences. Harcourt, Brace and World, 1962.
警告：這些引文格式不一定是100％准確.