Cita APA (7a ed.)

Alder, J., & Wilkinson, D. (1999). Environmental law and ethics. MacMillan.

Cita Chicago Style (17a ed.)

Alder, John, y David Wilkinson. Environmental Law and Ethics. Basingstoke [etc.]: MacMillan, 1999.

Cita MLA (9a ed.)

Alder, John, y David Wilkinson. Environmental Law and Ethics. MacMillan, 1999.