APA (7th ed.) Citation
Willis, F. R. (1973). World civilizations: An urban perspective. D.C. Heath.
Chicago Style (17th ed.) Citation
Willis, F. Roy. World Civilizations: An Urban Perspective. Massachusetts: D.C. Heath, 1973.
MLA (9th ed.) Citation
Willis, F. Roy. World Civilizations: An Urban Perspective. D.C. Heath, 1973.
Warning: These citations may not always be 100% accurate.