APA引文

National Geographic Society (U.S.). (1999). National Geographic United States atlas for young explorers. Washington, D.C: National Geographic Society.

Trích dẫn kiểu Chicago

National Geographic Society (U.S.). National Geographic United States Atlas for Young Explorers. Washington, D.C: National Geographic Society, 1999.

MLA引文

National Geographic Society (U.S.). National Geographic United States Atlas for Young Explorers. Washington, D.C: National Geographic Society, 1999.

警告：这些引文格式不一定是100％准确.