APA (7th ed.) Citation

Estrada, R. J. (1978). Correlates of productivity among tobacco farmers of Isabela [microform]. Photoduplication Service, University of the Philippines Library.

Chicago Style (17th ed.) Citation

Estrada, Robustiano J. Correlates of Productivity Among Tobacco Farmers of Isabela [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1978.

MLA (9th ed.) Citation

Estrada, Robustiano J. Correlates of Productivity Among Tobacco Farmers of Isabela [microform]. Photoduplication Service, University of the Philippines Library, 1978.