MLA

Marriott, Norman G, and Robert B Gravani. Principles of Food Sanitation. Springer US, 2006.

APA

Marriott, N. G, & Gravani, R. B. (2006). Principles of Food Sanitation. Springer US.

Chicago

Marriott, Norman G., and Robert B Gravani. Principles of Food Sanitation. : Springer US, 2006.