Cita APA (7a ed.)

Alexander, L. G. (1973). Mainline: Progress B : student's book. Longman.

Cita Chicago Style (17a ed.)

Alexander, L. G. Mainline: Progress B : Student's Book. London: Longman, 1973.

Cita MLA (9a ed.)

Alexander, L. G. Mainline: Progress B : Student's Book. Longman, 1973.