Villamil, W. M. (1999). Trade liberalization and child labor in the Philippines: A preliminary inquiry. The DLSU-Angelo King Institute for Economic and Business Studies.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Villamil, Winfred M. Trade Liberalization and Child Labor in the Philippines: A Preliminary Inquiry. Manila: The DLSU-Angelo King Institute for Economic and Business Studies, 1999.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Villamil, Winfred M. Trade Liberalization and Child Labor in the Philippines: A Preliminary Inquiry. The DLSU-Angelo King Institute for Economic and Business Studies, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.