Cita APA (7th ed.)
Sharpe, P. J. (1996). Pass key to the TOEFL (2 ed.). Barron's educational series INC.
Cita Chicago (17th ed.)
Sharpe, Pamela J. Pass Key to the TOEFL. 2 ed. Barron's educational series INC, 1996.
Cita MLA (9th ed.)
Sharpe, Pamela J. Pass Key to the TOEFL. 2 ed. Barron's educational series INC, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.