Philippines. Institute for Labor Studies. (2005). The Assumption and certification power in the Philippines: Context, issues and options. Institute for Labor Studies.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippines. Institute for Labor Studies. The Assumption and Certification Power in the Philippines: Context, Issues and Options. Manila: Institute for Labor Studies, 2005.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippines. Institute for Labor Studies. The Assumption and Certification Power in the Philippines: Context, Issues and Options. Institute for Labor Studies, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.