Quispe Guanca, J. L. (2007). Characterization of the environmental and productive impact of the different coffee certification standars in Costa Rica.
Citación estilo ChicagoQuispe Guanca, José L. Characterization of the Environmental and Productive Impact of the Different Coffee Certification Standars in Costa Rica. 2007.
MLA引文Quispe Guanca, José L. Characterization of the Environmental and Productive Impact of the Different Coffee Certification Standars in Costa Rica. 2007.
警告：這些引文格式不一定是100％准確.