Cruz, P. E. (1975). Analytical study of the Philippine Maritime Commission as proposed in House Bill no. 4266 [microform]. Photoduplication Service, University of the Philippines Library.
Lua i Stíl Chicago (17ú heag.)Cruz, Perfecto E. Analytical Study of the Philippine Maritime Commission as Proposed in House Bill No. 4266 [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1975.
Lua MLA (9ú heag.)Cruz, Perfecto E. Analytical Study of the Philippine Maritime Commission as Proposed in House Bill No. 4266 [microform]. Photoduplication Service, University of the Philippines Library, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.