APA (7th ed.) Citation

Willett, W. (1998). Nutritional epidemiology (2nd ed.). Oxford university.

Chicago Style (17th ed.) Citation

Willett, Walter. Nutritional Epidemiology. 2nd ed. New York ; Oxford: Oxford university, 1998.

MLA (9th ed.) Citation

Willett, Walter. Nutritional Epidemiology. 2nd ed. Oxford university, 1998.