Cita APA (7th ed.)

Opschoor, J. B., Button, K. J., & Nijkamp, P. (1999). Environmental economics and development. E. Elgar Pub.

Cita Chicago (17th ed.)

Opschoor, Johannes B., Kenneth John Button, i Peter Nijkamp. Environmental Economics and Development. Cheltenham, UK: E. Elgar Pub, 1999.

Cita MLA (9th ed.)

Opschoor, Johannes B., et al. Environmental Economics and Development. E. Elgar Pub, 1999.