APA (7th ed.) Zitazioa

Creme, P., & Lea, M. R. (1997). Writing at university: A guide for students. Open University.

Chicago Style (17th ed.) Zitazioa

Creme, Phyllis, eta Mary R. Lea. Writing at University: A Guide for Students. Buckingham: Open University, 1997.

MLA (9th ed.) Zitazioa

Creme, Phyllis, eta Mary R. Lea. Writing at University: A Guide for Students. Open University, 1997.