Cita APA (7th ed.)

Broughton, G. (1971). Success with english: Objetive test book. Penguin Books.

Cita Chicago (17th ed.)

Broughton, Geoffrey. Success with English: Objetive Test Book. Harmondsworth: Penguin Books, 1971.

Cita MLA (9th ed.)

Broughton, Geoffrey. Success with English: Objetive Test Book. Penguin Books, 1971.