Cruz, C. (1975). The feasibility study on a refractory plant [microform]. Photoduplication Service, University of the Philippines Library.
Lua i Stíl Chicago (17ú heag.)Cruz, Cecilio. The Feasibility Study on a Refractory Plant [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1975.
Lua MLA (9ú heag.)Cruz, Cecilio. The Feasibility Study on a Refractory Plant [microform]. Photoduplication Service, University of the Philippines Library, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.