Philippines. Department of Trade and Tourism. (1973). Policy recommendations: Integrated development and promotion of Philippine tourism and foreign trade. The Department.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippines. Department of Trade and Tourism. Policy Recommendations: Integrated Development and Promotion of Philippine Tourism and Foreign Trade. [Manila]: The Department, 1973.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippines. Department of Trade and Tourism. Policy Recommendations: Integrated Development and Promotion of Philippine Tourism and Foreign Trade. The Department, 1973.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.