APA (7e ed.) Bronvermelding
Willis, F. R. (1977). Western civilization: An urban perspective (2nd.ed.). D.C.Heath and Co..
Chicago (17e ed.) Bronvermelding
Willis, F. Roy. Western Civilization: An Urban Perspective. 2nd.ed. Lexington: D.C.Heath and Co., 1977.
MLA (9e ed.) Bronvermelding
Willis, F. Roy. Western Civilization: An Urban Perspective. 2nd.ed. D.C.Heath and Co., 1977.
Let op: Deze citaties zijn niet altijd 100% accuraat.