Perdigon, G. P., Claudio, V. S., Chavez, L. D. L., & Ruiz, A. J. (2006). Food, water and environmental sanitation and safety for the hospitality industry and institutions. Merriam & Webster Bookstore.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Perdigon, Grace Portugal-, Virginia Serraon- Claudio, Libia De Lima- Chavez, و Adela Jamorabo Ruiz. Food, Water and Environmental Sanitation and Safety for the Hospitality Industry and Institutions. Manila: Merriam & Webster Bookstore, 2006.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Perdigon, Grace Portugal-, et al. Food, Water and Environmental Sanitation and Safety for the Hospitality Industry and Institutions. Merriam & Webster Bookstore, 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.