Cita APA (7th ed.)

Isard, W. (1972). Ecologic-economic analysis for regional development. Free Press.

Cita Chicago (17th ed.)

Isard, Walter. Ecologic-economic Analysis for Regional Development. New York: Free Press, 1972.

Cita MLA (9th ed.)

Isard, Walter. Ecologic-economic Analysis for Regional Development. Free Press, 1972.