Preston, T. (1974). Intensive beef production (2nd edition.). Pergamon.
Cita Chicago Style (17a ed.)Preston, T.R. Intensive Beef Production. 2nd edition. Oxford: Pergamon, 1974.
Cita MLA (8a ed.)Preston, T.R. Intensive Beef Production. 2nd edition. Pergamon, 1974.
Precaución: Estas citas no son 100% exactas.