APA (7th ed.) Citation

National Geographic Book Service. (2018). National Geographic guide to scenic highways & byways (Fifth edition.). National geographic.

Chicago Style (17th ed.) Citation

National Geographic Book Service. National Geographic Guide to Scenic Highways & Byways. Fifth edition. Washington, D.C.: National geographic, 2018.

MLA (8th ed.) Citation

National Geographic Book Service. National Geographic Guide to Scenic Highways & Byways. Fifth edition. National geographic, 2018.

Warning: These citations may not always be 100% accurate.