Harrison, M., & Kerr, R. (1997). First certificate practice tests. New York: Oxford University Press.
Trích dẫn kiểu ChicagoHarrison, Mark., và Rosalie Kerr. First Certificate Practice Tests. New York: Oxford University Press, 1997.
MLA引文Harrison, Mark., và Rosalie Kerr. First Certificate Practice Tests. New York: Oxford University Press, 1997.
警告：这些引文格式不一定是100％准确.