Sto. Tomas, P. A. (1977). Communication levels and socio-economic development in Southern Luzon (Region IV) [microform]. Photoduplication Service, University of the Philippines Library.
Chicago-viite (17. p.)Sto. Tomas, Patricia A. Communication Levels and Socio-economic Development in Southern Luzon (Region IV) [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.
MLA-viite (9. p.)Sto. Tomas, Patricia A. Communication Levels and Socio-economic Development in Southern Luzon (Region IV) [microform]. Photoduplication Service, University of the Philippines Library, 1977.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.