Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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