Cita APA (7a ed.)

Kingsbury, R. (1984). Longman first certificate: Coursebook. Longman.

Cita Chicago Style (17a ed.)

Kingsbury, Roy. Longman First Certificate: Coursebook. Essex: Longman, 1984.

Cita MLA (9a ed.)

Kingsbury, Roy. Longman First Certificate: Coursebook. Longman, 1984.