Cita APA

Willis, K. G., Button, K. J., & Nijkamp, P. (1999). Environmental valuation. Edward Elgar Pub.

Citación estilo Chicago

Willis, K. G., Kenneth John Button, and Peter Nijkamp. Environmental Valuation. Cheltenham, UK, Northampton, MA: Edward Elgar Pub, 1999.

Cita MLA

Willis, K. G., et al. Environmental Valuation. Edward Elgar Pub, 1999.