APA (7th ed.) Zitazioa
Sharpe, P. J. (1996). Pass key to the TOEFL (2 ed.). Barron's educational series INC.
Chicago Style (17th ed.) Zitazioa
Sharpe, Pamela J. Pass Key to the TOEFL. 2 ed. Barron's educational series INC, 1996.
MLA (9th ed.) Zitazioa
Sharpe, Pamela J. Pass Key to the TOEFL. 2 ed. Barron's educational series INC, 1996.
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