APA (7th ed.) Citation

Duffy, P., & Fraser, D. (1986). Variations: Reading skills/oral communication for beginning students of ESL. Prentice Hall.

Chicago Style (17th ed.) Citation

Duffy, Patricia, and Daphne Fraser. Variations: Reading Skills/oral Communication for Beginning Students of ESL. New Jersey: Prentice Hall, 1986.

MLA (8th ed.) Citation

Duffy, Patricia, and Daphne Fraser. Variations: Reading Skills/oral Communication for Beginning Students of ESL. Prentice Hall, 1986.