Gutierrez, B. P. B. (2004). Differentiating among major Philippine toothpaste brands: A quantitative study. College of Business Administration, University of the Philippines.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Gutierrez, Ben Paul B. Differentiating Among Major Philippine Toothpaste Brands: A Quantitative Study. Quezon City: College of Business Administration, University of the Philippines, 2004.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Gutierrez, Ben Paul B. Differentiating Among Major Philippine Toothpaste Brands: A Quantitative Study. College of Business Administration, University of the Philippines, 2004.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.