APA (7th ed.) Zitazioa

NIJKAMP, P. (1976). Environmental economics. Martinus Nijhoff Social Sciences Division.

Chicago Style (17th ed.) Zitazioa

NIJKAMP, Peter. Environmental Economics. Leiden: Martinus Nijhoff Social Sciences Division, 1976.

MLA (9th ed.) Zitazioa

NIJKAMP, Peter. Environmental Economics. Martinus Nijhoff Social Sciences Division, 1976.