Ruíz, M. E., Cubillos, G., & Deaton, O. (1979). A system of milk production for small farmers.
Citación estilo ChicagoRuíz, M. E., G. Cubillos, y O. Deaton. A System of Milk Production for Small Farmers. 1979.
MLA引文Ruíz, M. E., G. Cubillos, y O. Deaton. A System of Milk Production for Small Farmers. 1979.
警告：这些引文格式不一定是100％准确.