Calvero, T. E. (1974). A critical analysis of the B.P.S. tentative curriculum guides for general science I & II for Philippine high schools. University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Calvero, Teofidez E. A Critical Analysis of the B.P.S. Tentative Curriculum Guides for General Science I & II for Philippine High Schools. Quezon City: University of the Philippines Library, 1974.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Calvero, Teofidez E. A Critical Analysis of the B.P.S. Tentative Curriculum Guides for General Science I & II for Philippine High Schools. University of the Philippines Library, 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.