Lange, O. (1970). Papers in economics and sociology ([1st English ed.].). Pergamon Press.
Chicago (17e ed.) BronvermeldingLange, Oskar. Papers in Economics and Sociology. [1st English ed.]. New York: Pergamon Press, 1970.
MLA (9e ed.) BronvermeldingLange, Oskar. Papers in Economics and Sociology. [1st English ed.]. Pergamon Press, 1970.