APA-referens (7:e uppl.)

Cruz, C. (1975). The feasibility study on a refractory plant [microform]. Photoduplication Service, University of the Philippines Library.

Chicago-referens (17:e uppl.)

Cruz, Cecilio. The Feasibility Study on a Refractory Plant [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1975.

MLA-referens (9:e uppl.)

Cruz, Cecilio. The Feasibility Study on a Refractory Plant [microform]. Photoduplication Service, University of the Philippines Library, 1975.