APA (7th ed.) Citation

Huizenga & Thomas-Ruzic. (1990). Writing workout: A program for new students of English. Heinle-Heinle.

Chicago Style (17th ed.) Citation

Huizenga and Thomas-Ruzic. Writing Workout: A Program for New Students of English. Boston: Heinle-Heinle, 1990.

MLA (9th ed.) Citation

Huizenga and Thomas-Ruzic. Writing Workout: A Program for New Students of English. Heinle-Heinle, 1990.

Warning: These citations may not always be 100% accurate.