Wirasinghe, S. (1980). Adoption of high yielding rice farming practices by the rice farmers in the Amparai District, Republic of Sri Lanka [microform]. Photoduplication Service. University of the Philippines Library.
Cytowanie według stylu Chicago (wyd. 17)Wirasinghe, Suranimala. Adoption of High Yielding Rice Farming Practices by the Rice Farmers in the Amparai District, Republic of Sri Lanka [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1980.
Cytowanie według stylu MLA (wyd. 9)Wirasinghe, Suranimala. Adoption of High Yielding Rice Farming Practices by the Rice Farmers in the Amparai District, Republic of Sri Lanka [microform]. Photoduplication Service. University of the Philippines Library, 1980.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..