Free, J. B. (1993). Insect pollination of crops (2° ed.). London: Academic Press.
Citación estilo ChicagoFree, John B. Insect Pollination of Crops. 2° ed. London: Academic Press, 1993.
Cita MLAFree, John B. Insect Pollination of Crops. 2° ed. London: Academic Press, 1993.
Precaución: Estas citas no son 100% exactas.