APA استشهاد

Hawke, N. (2002). Environmental policy: Implementation and enforcement. Ashgate.

استشهاد بنمط شيكاغو

Hawke, Neil. Environmental Policy: Implementation and Enforcement. England: Ashgate, 2002.

MLA استشهاد

Hawke, Neil. Environmental Policy: Implementation and Enforcement. Ashgate, 2002.