APA استشهاد

Kusky, T. (2006). The encyclopedia of earth science. Viva Books.

استشهاد بنمط شيكاغو

Kusky, Timothy. The Encyclopedia of Earth Science. New Delhi: Viva Books, 2006.

MLA استشهاد

Kusky, Timothy. The Encyclopedia of Earth Science. Viva Books, 2006.