, S., & , D. H. (2006). Soil erosion risk assessment. [Yogyakarta] : Universitas Gadjah Mada.
Chicago Style Citation, SETIAWAN, and Dr. Hartono. Soil Erosion Risk Assessment. [Yogyakarta] : Universitas Gadjah Mada, 2006.
MLA引文, SETIAWAN, and Dr. Hartono. Soil Erosion Risk Assessment. [Yogyakarta] : Universitas Gadjah Mada, 2006.
警告：這些引文格式不一定是100％准確.