Ng, L. K. (1976). The traditional and the new social studies in secondary schools of Greater Manila: Its implications for the secondary schools of Hong Kong [microform]. Photoduplication Service, University of the Philippines Library.
Čikaški stil citiranja (17. izdanje)Ng, Louis Kai-Gay. The Traditional and the New Social Studies in Secondary Schools of Greater Manila: Its Implications for the Secondary Schools of Hong Kong [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1976.
MLA način citiranja (9. izdanje)Ng, Louis Kai-Gay. The Traditional and the New Social Studies in Secondary Schools of Greater Manila: Its Implications for the Secondary Schools of Hong Kong [microform]. Photoduplication Service, University of the Philippines Library, 1976.