APA引文

National Geographic Society (U.S.). (1991). National Geographic picture atlas of our world. The National Geographic Society.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.). National Geographic Picture Atlas of Our World. Washington D.C: The National Geographic Society, 1991.

MLA引文

National Geographic Society (U.S.). National Geographic Picture Atlas of Our World. The National Geographic Society, 1991.

警告：這些引文格式不一定是100％准確.