Cita APA (7a ed.)
Sahlu, D., Pfeifer, C., Abebe, Y., & Omolo, A. (2011). Geographic information system: Practical training manual for agricultural research centers. Amhara Regional Agricultural Research Institute, Ethiopia.
Cita Chicago Style (17a ed.)
Sahlu, D., Catherine Pfeifer, Yenenesh Abebe, y Abisalom Omolo. Geographic Information System: Practical Training Manual for Agricultural Research Centers. Amhara Regional Agricultural Research Institute, Ethiopia, 2011.
Cita MLA (9a ed.)
Sahlu, D., et al. Geographic Information System: Practical Training Manual for Agricultural Research Centers. Amhara Regional Agricultural Research Institute, Ethiopia, 2011.
Precaución: Estas citas no son 100% exactas.