Bobrow, J. (1991). Toefl Preparation. Cliffs Notes.
Cita Chicago (17th ed.)Bobrow, Jerry. Toefl Preparation. Lincoln, NE: Cliffs Notes, 1991.
Cita MLA (9th ed.)Bobrow, Jerry. Toefl Preparation. Cliffs Notes, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.