Cita APA (7a ed.)

Binham, P., & Philip, B. (1977). Executive english: Book-2. Longman.

Cita Chicago Style (17a ed.)

Binham, Philip, y Binham Philip. Executive English: Book-2. London: Longman, 1977.

Cita MLA (9a ed.)

Binham, Philip, y Binham Philip. Executive English: Book-2. Longman, 1977.