Cita APA

National Geographic Society, & National Geographic Society. (2007). Guide to scenic highways & byways (3. edition.). Washington, D.C.: National Geographic.

Citación estilo Chicago

National Geographic Society, y National Geographic Society. Guide to Scenic Highways & Byways. 3. edition. Washington, D.C.: National Geographic, 2007.

Cita MLA

National Geographic Society, y National Geographic Society. Guide to Scenic Highways & Byways. 3. edition. Washington, D.C.: National Geographic, 2007.