Cita APA (7a ed.)
Spain, J. M. (1981). Agricultural potential of low activity clay soils of the humid tropics. International Center for Tropical Agriculture.
Cita Chicago Style (17a ed.)
Spain, James M. Agricultural Potential of Low Activity Clay Soils of the Humid Tropics. International Center for Tropical Agriculture, 1981.
Cita MLA (9a ed.)
Spain, James M. Agricultural Potential of Low Activity Clay Soils of the Humid Tropics. International Center for Tropical Agriculture, 1981.
Precaución: Estas citas no son 100% exactas.