Cunningham, W. P. (2004). Principle of environmental science: Inquiry and applications. New York, NY: McGraw-Hill.
استشهاد بنمط شيكاغوCunningham, William P. Principle of Environmental Science: Inquiry and Applications. New York, NY: McGraw-Hill, 2004.
MLA استشهادCunningham, William P. Principle of Environmental Science: Inquiry and Applications. New York, NY: McGraw-Hill, 2004.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.