APA-viite (7. p.)
ebrary, Inc, & Graaff, J. d. (2007). Monitoring and evaluation of soil conservation and watershed development projects. Science Publishers.
Chicago-viite (17. p.)
ebrary, Inc, ja J. de Graaff. Monitoring and Evaluation of Soil Conservation and Watershed Development Projects. Enfield, NH: Science Publishers, 2007.
MLA-viite (9. p.)
ebrary, Inc, ja J. de Graaff. Monitoring and Evaluation of Soil Conservation and Watershed Development Projects. Science Publishers, 2007.
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