Wagelie, E. G. (1977). Study on some physical and chemical characteristics of Berkshire boar semen including effects of atmospheric temperature at collection time [microform]. Photoduplication Service. University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wagelie, Edwin G. Study on Some Physical and Chemical Characteristics of Berkshire Boar Semen Including Effects of Atmospheric Temperature at Collection Time [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Wagelie, Edwin G. Study on Some Physical and Chemical Characteristics of Berkshire Boar Semen Including Effects of Atmospheric Temperature at Collection Time [microform]. Photoduplication Service. University of the Philippines Library, 1977.