Cita APA (7a ed.)

Garton-Sprenger, J., & Greenall, S. (1983). On course for first certificate: Students' Book. Heinemann.

Cita Chicago Style (17a ed.)

Garton-Sprenger, Judy, y Simon Greenall. On Course for First Certificate: Students' Book. London: Heinemann, 1983.

Cita MLA (9a ed.)

Garton-Sprenger, Judy, y Simon Greenall. On Course for First Certificate: Students' Book. Heinemann, 1983.