Bagtas, J. E., & Dyoco, R. N. (1999). The farmers of San Simon before and after the temporary closure of ugnayang magsasaka ng San Simon inc: A socio-economic analysis. University of the Philippines Diliman Extension Program in Pampanga.
Παραπομπή σε μορφή Chicago (17η εκδ.)Bagtas, Jonathan Esguerra, και Romeo N. Dyoco. The Farmers of San Simon Before and After the Temporary Closure of Ugnayang Magsasaka Ng San Simon Inc: A Socio-economic Analysis. Pampanga: University of the Philippines Diliman Extension Program in Pampanga, 1999.
Παραπομπή σε μορφή MLA (9th εκδ.)Bagtas, Jonathan Esguerra, και Romeo N. Dyoco. The Farmers of San Simon Before and After the Temporary Closure of Ugnayang Magsasaka Ng San Simon Inc: A Socio-economic Analysis. University of the Philippines Diliman Extension Program in Pampanga, 1999.