Rerkrai, D. (1977). A comparison of two types of extension workers in Thailand according to certain aspects of their job [microform]. Photoduplication Service. University of the Philippines Library.
Citazione stile Chigago Style (17a edizione)Rerkrai, Direk. A Comparison of Two Types of Extension Workers in Thailand According to Certain Aspects of Their Job [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Citatione MLA (9a ed.)Rerkrai, Direk. A Comparison of Two Types of Extension Workers in Thailand According to Certain Aspects of Their Job [microform]. Photoduplication Service. University of the Philippines Library, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.