Citazione Stile APA (7a Edizione)

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.