Cita APA (7th ed.)

Willis, K. G. (1971). Models of population and income: Economic and planning in rural areas.

Cita Chicago (17th ed.)

Willis, Kenneth George. Models of Population and Income: Economic and Planning in Rural Areas. Newcastle Upon Tyne, Agricultural Adjustment Unit, University of Newcastle Upon Tyne, 1971.

Cita MLA (9th ed.)

Willis, Kenneth George. Models of Population and Income: Economic and Planning in Rural Areas. 1971.