Duncan, O. D. (1961). Statistical geography: Problems in analyzing areal data. Free Press.
Cita Chicago (17th ed.)Duncan, Otis Dudley. Statistical Geography: Problems in Analyzing Areal Data. Glencoe, Ill: Free Press, 1961.
Cita MLA (9th ed.)Duncan, Otis Dudley. Statistical Geography: Problems in Analyzing Areal Data. Free Press, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.