APA引文

National Geographic Society. (2002). McGraw-Hill science. New York: McGraw-Hill.

Trích dẫn kiểu Chicago

National Geographic Society. McGraw-Hill Science. New York: McGraw-Hill, 2002.

MLA引文

National Geographic Society. McGraw-Hill Science. New York: McGraw-Hill, 2002.

警告：這些引文格式不一定是100％准確.