National Geographic Book Service. (2018). National Geographic guide to scenic highways & byways (Fifth edition.). National geographic.
Style de citation Chicago (17e éd.)National Geographic Book Service. National Geographic Guide to Scenic Highways & Byways. Fifth edition. Washington, D.C.: National geographic, 2018.
Style de citation MLA (8e éd.)National Geographic Book Service. National Geographic Guide to Scenic Highways & Byways. Fifth edition. National geographic, 2018.
Attention : ces citations peuvent ne pas être correctes à 100%.