APA (7th ed.) Citation

Herrera, M., & Hojel, B. (1999). Balloons: Workbook.

Chicago Style (17th ed.) Citation

Herrera, Mario, and Barbara Hojel. Balloons: Workbook. New York, 1999.

MLA (9th ed.) Citation

Herrera, Mario, and Barbara Hojel. Balloons: Workbook. 1999.

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