APA استشهاد

Michael Allaby. (2000). Basics of environmental science (2nd.). Routledge.

استشهاد بنمط شيكاغو

Michael Allaby. Basics of Environmental Science. 2nd. London: Routledge, 2000.

MLA استشهاد

Michael Allaby. Basics of Environmental Science. 2nd. Routledge, 2000.