Vo Ai Quac. (1977). The calcium and phosphorus requirements of swine: Weanling pigs from 10 to 20 kilogram liveweight [microform]. Photoduplication Service, University of the Philippines Library.
Cita Chicago (17th ed.)Vo Ai Quac. The Calcium and Phosphorus Requirements of Swine: Weanling Pigs from 10 to 20 Kilogram Liveweight [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.
Cita MLA (9th ed.)Vo Ai Quac. The Calcium and Phosphorus Requirements of Swine: Weanling Pigs from 10 to 20 Kilogram Liveweight [microform]. Photoduplication Service, University of the Philippines Library, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.