Cita APA (7a ed.)
Duckworth, M., Peel, E., & Aspinall, P. (1992). Success at First Certificate: Practice Tests 2 with key (5.impression.). The University Press.
Cita Chicago Style (17a ed.)
Duckworth, Michael, E. Peel, y P. Aspinall. Success at First Certificate: Practice Tests 2 with Key. 5.impression. Oxford: The University Press, 1992.
Cita MLA (9a ed.)
Duckworth, Michael, et al. Success at First Certificate: Practice Tests 2 with Key. 5.impression. The University Press, 1992.
Precaución: Estas citas no son 100% exactas.