Cayanan, L. F. (1974). Some production and marketing problems of the Pampanga sugar industry [microform]. Photoduplication Service, University of the Philippines Library.
Παραπομπή σε μορφή Chicago (17η εκδ.)Cayanan, Leonida F. Some Production and Marketing Problems of the Pampanga Sugar Industry [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1974.
Παραπομπή σε μορφή MLA (9th εκδ.)Cayanan, Leonida F. Some Production and Marketing Problems of the Pampanga Sugar Industry [microform]. Photoduplication Service, University of the Philippines Library, 1974.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.