Cita APA (7a ed.)
Gebresenbet, G., Zerbini, E., Astatke, A., & Kaumbutho, P. (1997). Optimization of animal drawn tillage implement systems: Part 2, Development of a reversible plough and a ridger. Elsevier.
Cita Chicago Style (17a ed.)
Gebresenbet, G., E. Zerbini, A. Astatke, y P. Kaumbutho. Optimization of Animal Drawn Tillage Implement Systems: Part 2, Development of a Reversible Plough and a Ridger. Elsevier, 1997.
Cita MLA (9a ed.)
Gebresenbet, G., et al. Optimization of Animal Drawn Tillage Implement Systems: Part 2, Development of a Reversible Plough and a Ridger. Elsevier, 1997.
Precaución: Estas citas no son 100% exactas.