APA استشهاد

Richardson, T. M., & Nicodemus, W. R. (1981). Sanitation for food service workers (3rd ed.). Van Nostrand Reinhold Company.

استشهاد بنمط شيكاغو

Richardson, Treva M., و Wade R. Nicodemus. Sanitation for Food Service Workers. 3rd ed. New York: Van Nostrand Reinhold Company, 1981.

MLA استشهاد

Richardson, Treva M., و Wade R. Nicodemus. Sanitation for Food Service Workers. 3rd ed. Van Nostrand Reinhold Company, 1981.