APA引文

Covington, G. (2010). International encyclopedia of sustainable development. Apple academic.

Chicago Edition Citation

Covington, Gareth. International Encyclopedia of Sustainable Development. Oakville: Apple academic, 2010.

MLA引文

Covington, Gareth. International Encyclopedia of Sustainable Development. Apple academic, 2010.

警告：這些引文格式不一定是100％准確.