Magdalena, F. V. (1981). Research conceptualization made easy. University Research Center, Mindanao State University.
Chicago-referens (17:e uppl.)Magdalena, Federico V. Research Conceptualization Made Easy. Marawi City: University Research Center, Mindanao State University, 1981.
MLA-referens (9:e uppl.)Magdalena, Federico V. Research Conceptualization Made Easy. University Research Center, Mindanao State University, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.