Cita APA (7a ed.)
Duckworth, M., Aspinall, T., & Peel, E. (1989). Success at First Certificate: Practice Test 2. The University Press.
Cita Chicago Style (17a ed.)
Duckworth, Michael, Tricia Aspinall, y E. Peel. Success at First Certificate: Practice Test 2. Oxford: The University Press, 1989.
Cita MLA (9a ed.)
Duckworth, Michael, et al. Success at First Certificate: Practice Test 2. The University Press, 1989.
Precaución: Estas citas no son 100% exactas.