APA (7th ed.) Citation

National Geographic Society (U.S.) & Adams, L. (1986). Visiting our past: A supplemental guide to selected sites (Revision 1986.). National Geographic Society.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.) and Leslie Adams. Visiting Our Past: A Supplemental Guide to Selected Sites. Revision 1986. Washington, D.C.: National Geographic Society, 1986.

MLA (9th ed.) Citation

National Geographic Society (U.S.) and Leslie Adams. Visiting Our Past: A Supplemental Guide to Selected Sites. Revision 1986. National Geographic Society, 1986.