APA استشهاد

Hempel, L. C. (1996). Environmental governance: The global challenge. Island press.

استشهاد بنمط شيكاغو

Hempel, Lamont C. Environmental Governance: The Global Challenge. Washington: Island press, 1996.

MLA استشهاد

Hempel, Lamont C. Environmental Governance: The Global Challenge. Island press, 1996.