APA (7th ed.) Citation

Hay, J. (1998). Vitamin C: Everything you need to know. People's Medical Society.

Chicago Style (17th ed.) Citation

Hay, Jennifer. Vitamin C: Everything You Need to Know. Allentown, Pa.: People's Medical Society, 1998.

MLA (9th ed.) Citation

Hay, Jennifer. Vitamin C: Everything You Need to Know. People's Medical Society, 1998.