Cita APA (7a ed.)

Andrews, S. (1984). Preparing for proficiency. Heinemann Educational Books.

Cita Chicago Style (17a ed.)

Andrews, Stephen. Preparing for Proficiency. London: Heinemann Educational Books, 1984.

Cita MLA (8a ed.)

Andrews, Stephen. Preparing for Proficiency. Heinemann Educational Books, 1984.