APA citiranje

Ruíz, M. E., Cubillos, G., & Deaton, O. (1979). A system of milk production for small farmers.

Citación estilo Chicago

Ruíz, M. E., G. Cubillos, y O. Deaton. A System of Milk Production for Small Farmers. 1979.

MLA citiranje

Ruíz, M. E., G. Cubillos, y O. Deaton. A System of Milk Production for Small Farmers. 1979.