Cita APA (7a ed.)
Hart, J. F. (2001). Half a century of cropland change. Geographical Review, 91(3), 525-544.
Cita Chicago Style (17a ed.)
Hart, John Fraser. "Half a Century of Cropland Change." Geographical Review 91, no. 3 (2001): 525-544.
Cita MLA (9a ed.)
Hart, John Fraser. "Half a Century of Cropland Change." Geographical Review, vol. 91, no. 3, 2001, pp. 525-544.
Precaución: Estas citas no son 100% exactas.