Celestino, A. F. (1977). The effects of irrigation, nitrogen fertilization and maleic hydrazide spray on the yield, composition and storage behavior of bulbs of two onion varieties [microform]. Photoduplication Service. University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Celestino, Andres F. The Effects of Irrigation, Nitrogen Fertilization and Maleic Hydrazide Spray on the Yield, Composition and Storage Behavior of Bulbs of Two Onion Varieties [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Celestino, Andres F. The Effects of Irrigation, Nitrogen Fertilization and Maleic Hydrazide Spray on the Yield, Composition and Storage Behavior of Bulbs of Two Onion Varieties [microform]. Photoduplication Service. University of the Philippines Library, 1977.