Dierolf, T. (2001). Soil Fertility Kit: A toolkit for acid, Upland soil fertility management in Southeast Asia. Indonesia: Agency for Agricultural Human resources development.
Trích dẫn kiểu ChicagoDierolf, Thomas. Soil Fertility Kit: A Toolkit for Acid, Upland Soil Fertility Management in Southeast Asia. Indonesia: Agency for Agricultural Human resources development, 2001.
Trích dẫn MLADierolf, Thomas. Soil Fertility Kit: A Toolkit for Acid, Upland Soil Fertility Management in Southeast Asia. Indonesia: Agency for Agricultural Human resources development, 2001.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.