Concepcion, N. S. (1979). An analysis of the teaching methods and practices in Philippine history and government in the public and selected private secondary schools in Manila [microform]. Photoduplication Service. University of the Philippines Library.

Concepcion, Nenita Songco. An Analysis of the Teaching Methods and Practices in Philippine History and Government in the Public and Selected Private Secondary Schools in Manila [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1979.

Concepcion, Nenita Songco. An Analysis of the Teaching Methods and Practices in Philippine History and Government in the Public and Selected Private Secondary Schools in Manila [microform]. Photoduplication Service. University of the Philippines Library, 1979.