Cita APA (7th ed.)

National Geographic Society (U.S.). (1991). Research & exploration: A scholarly publication of the National Geographic Society. The Society.

Cita Chicago (17th ed.)

National Geographic Society (U.S.). Research & Exploration: A Scholarly Publication of the National Geographic Society. Washington, D.C.: The Society, 1991.

Cita MLA (8th ed.)

National Geographic Society (U.S.). Research & Exploration: A Scholarly Publication of the National Geographic Society. The Society, 1991.