Cita APA (7a ed.)
Wrigley, E. A. (1974). Population and history. McGraw-Hill.
Cita Chicago Style (17a ed.)
Wrigley, E. A. Population and History. New York ; Toronto: McGraw-Hill, 1974.
Cita MLA (9a ed.)
Wrigley, E. A. Population and History. McGraw-Hill, 1974.
Precaución: Estas citas no son 100% exactas.