Cita APA (7th ed.)
Barnard, C. (1979). Farm planning and control (2nd.ed.). Cambridge Univ..
Cita Chicago (17th ed.)
Barnard, C.S. Farm Planning and Control. 2nd.ed. Cambridge: Cambridge Univ., 1979.
Cita MLA (9th ed.)
Barnard, C.S. Farm Planning and Control. 2nd.ed. Cambridge Univ., 1979.
Atenció: Aquestes cites poden no estar 100% correctes.