Cita APA

Harrison, M., & Kerr, R. (1998). Proficiency practice tests: With answers. New York: Oxford University Press.

Chicago Style Citation

Harrison, Mark., i Rosalie Kerr. Proficiency Practice Tests: With Answers. New York: Oxford University Press, 1998.

Cita MLA

Harrison, Mark., i Rosalie Kerr. Proficiency Practice Tests: With Answers. New York: Oxford University Press, 1998.

Atenció: Aquestes cites poden no estar 100% correctes.