Philippines (Republic). Office of the President & Presidential Economic Staff. (1967). Economic report on the province of Zamboanga del Sur. The Office.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippines (Republic). Office of the President و Presidential Economic Staff. Economic Report on the Province of Zamboanga Del Sur. [Manila]: The Office, 1967.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippines (Republic). Office of the President و Presidential Economic Staff. Economic Report on the Province of Zamboanga Del Sur. The Office, 1967.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.