De la Cruz, A. M. (1977). Academic preparation and work load of college teachers of national agricultural schools and colleges of the Bureau of Vocational Education. University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)De la Cruz, Andres Marcos. Academic Preparation and Work Load of College Teachers of National Agricultural Schools and Colleges of the Bureau of Vocational Education. Quezon City: University of the Philippines Library, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)De la Cruz, Andres Marcos. Academic Preparation and Work Load of College Teachers of National Agricultural Schools and Colleges of the Bureau of Vocational Education. University of the Philippines Library, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.