APA (7th ed.) Citation

Halula, J., Halula, W., & Harnist, B. (2012). Food allergies. Learning Zone Express.

Chicago Style (17th ed.) Citation

Halula, Jenica, Wes Halula, and Billy Harnist. Food Allergies. Owatonna, MN: Learning Zone Express, 2012.

MLA (9th ed.) Citation

Halula, Jenica, et al. Food Allergies. Learning Zone Express, 2012.