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.
芝加哥风格引文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.
MLA引文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.
警告：这些引文格式不一定是100％准确.