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.
Chicago-Zitierstil (17. Ausg.)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.
MLA-Zitierstil (9. Ausg.)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.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.