Cita APA (7a ed.)

Garton-Sprenger, J., & Greenall, S. (1988). On course for first certificate. Heinemann.

Cita Chicago Style (17a ed.)

Garton-Sprenger, Judy, y Simon Greenall. On Course for First Certificate. Oxford: Heinemann, 1988.

Cita MLA (8a ed.)

Garton-Sprenger, Judy, y Simon Greenall. On Course for First Certificate. Heinemann, 1988.