एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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