Petersen, W. (1975). Population, 3rd ed. (3rd ed.). Macmillan.
Cita Chicago Style (17a ed.)Petersen, William. Population, 3rd Ed. 3rd ed. New York: Macmillan, 1975.
Cita MLA (9a ed.)Petersen, William. Population, 3rd Ed. 3rd ed. Macmillan, 1975.
Precaución: Estas citas no son 100% exactas.