Hutabarat, P. H. (1980). Estimation of phenotypic and genetic parameters of feed efficiency and its component traits in two meat-type chicken population [microform]. Photoduplication Service, University of the Philippines Library.
Chicago-referens (17:e uppl.)Hutabarat, Pittor Hasudungan. Estimation of Phenotypic and Genetic Parameters of Feed Efficiency and Its Component Traits in Two Meat-type Chicken Population [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1980.
MLA-referens (9:e uppl.)Hutabarat, Pittor Hasudungan. Estimation of Phenotypic and Genetic Parameters of Feed Efficiency and Its Component Traits in Two Meat-type Chicken Population [microform]. Photoduplication Service, University of the Philippines Library, 1980.