APA استشهاد

World Resources Institute. (1998). World resources 1998-1999 a guide to the global environment, Environmental change and human health.

استشهاد بنمط شيكاغو

World Resources Institute. World Resources 1998-1999 a Guide to the Global Environment, Environmental Change and Human Health. Newyork, Oxford, 1998.

MLA استشهاد

World Resources Institute. World Resources 1998-1999 a Guide to the Global Environment, Environmental Change and Human Health. 1998.