Ghodake, R. D., Isaacson, B., & Hadfield, W. (1989). Maintaining sustainable agriculture in Papua New Guinea: The dynamics of farming systems. Bubia Agricultural Research Centre, Dept. of Agriculture and Livestock.
Lua i Stíl Chicago (17ú heag.)Ghodake, R. D., B. Isaacson, agus W. Hadfield. Maintaining Sustainable Agriculture in Papua New Guinea: The Dynamics of Farming Systems. Lae: Bubia Agricultural Research Centre, Dept. of Agriculture and Livestock, 1989.
Lua MLA (9ú heag.)Ghodake, R. D., et al. Maintaining Sustainable Agriculture in Papua New Guinea: The Dynamics of Farming Systems. Bubia Agricultural Research Centre, Dept. of Agriculture and Livestock, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.