Mercado, C. M. (1977). The relative effectiveness of four types of extension publications [microform]. Photoduplication Service.
Chicago Style aipamenaMercado, Cesar Matamorosa. The Relative Effectiveness of Four Types of Extension Publications [microform]. Quezon City: Photoduplication Service, 1977.
MLA aipamenaMercado, Cesar Matamorosa. The Relative Effectiveness of Four Types of Extension Publications [microform]. Photoduplication Service, 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.