Cita APA (7a ed.)
Yarwood, R. (2003). Beyond Six Billion: Forecasting the World's Population. Geographical Journal, 169(3), 291-292.
Cita Chicago Style (17a ed.)
Yarwood, Richard. "Beyond Six Billion: Forecasting the World's Population." Geographical Journal 169, no. 3 (2003): 291-292.
Cita MLA (9a ed.)
Yarwood, Richard. "Beyond Six Billion: Forecasting the World's Population." Geographical Journal, vol. 169, no. 3, 2003, pp. 291-292.
Precaución: Estas citas no son 100% exactas.