Cita APA (7a ed.)
Quigley, C. (1979). The evolution of civilizations: An introduction to historical analysis (Segunda edición.). Liberty Press.
Cita Chicago Style (17a ed.)
Quigley, Carroll. The Evolution of Civilizations: An Introduction to Historical Analysis. Segunda edición. Indianapolis: Liberty Press, 1979.
Cita MLA (9a ed.)
Quigley, Carroll. The Evolution of Civilizations: An Introduction to Historical Analysis. Segunda edición. Liberty Press, 1979.
警告：這些引文格式不一定是100％准確.