KENNEDY, D. B., KENYON, D. M., & MATTHIESEN, S. J. (1989). The newbury house TOEFL preparation kit: Preparing for the TOEFL. Newbury House Publishers.

KENNEDY, Daniel B., Dorry Mann KENYON, and Steven J. MATTHIESEN. The Newbury House TOEFL Preparation Kit: Preparing for the TOEFL. New York: Newbury House Publishers, 1989.

KENNEDY, Daniel B., et al. The Newbury House TOEFL Preparation Kit: Preparing for the TOEFL. Newbury House Publishers, 1989.