APA
Barrett M. A., . (1979). Milk and beef production in the tropics. Oxford: Oxford university press.
Chicago
Barrett M A, . 1979. Milk and beef production in the tropics. Oxford: Oxford university press.
Harvard
Barrett M. A., . (1979). Milk and beef production in the tropics. Oxford: Oxford university press.
MLA
Barrett M A, . Milk and beef production in the tropics. Oxford: Oxford university press. 1979.
