Cita APA (7th ed.)

Huizenga, J., & Thomas-Ruzic, M. (1990). Writing workout. A program for new students of english. Heinle and Heinle.

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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