APA aipamena

Sharpe, P. J. (1993). Practice exercise toefl. New York: Barron.

Chicago Style aipamena

Sharpe, Pamela J. Practice Exercise Toefl. New York: Barron, 1993.

MLA aipamena

Sharpe, Pamela J. Practice Exercise Toefl. New York: Barron, 1993.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.