Cita APA

Ritchie, D. A., & Donald A. Ritchie. (2001). The: A student companion. Oxford,New York: Oxford University Press.

Chicago Style Citation

Ritchie, Donald A., i Donald A. Ritchie. The: A Student Companion. Oxford,New York: Oxford University Press, 2001.

Cita MLA

Ritchie, Donald A., i Donald A. Ritchie. The: A Student Companion. Oxford,New York: Oxford University Press, 2001.

Atenció: Aquestes cites poden no estar 100% correctes.