University of the Philippines (Diliman). Institute of Mass Communication. (1982). Readership and utility of Initiatives in population, population events and PCF media services.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of the Philippines (Diliman). Institute of Mass Communication. Readership and Utility of Initiatives in Population, Population Events and PCF Media Services. 1982.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)University of the Philippines (Diliman). Institute of Mass Communication. Readership and Utility of Initiatives in Population, Population Events and PCF Media Services. 1982.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.