Del Rosario, B. P. (1980). Soil factors limiting sugar cane production in the Don Pedro Mill District, Batangas [microform]. Photoduplication Service, University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Del Rosario, Beatriz P. Soil Factors Limiting Sugar Cane Production in the Don Pedro Mill District, Batangas [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Del Rosario, Beatriz P. Soil Factors Limiting Sugar Cane Production in the Don Pedro Mill District, Batangas [microform]. Photoduplication Service, University of the Philippines Library, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.