National Geographic Book Service. (2018). National Geographic guide to scenic highways & byways (Fifth edition.). National geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Geographic Book Service. National Geographic Guide to Scenic Highways & Byways. Fifth edition. Washington, D.C.: National geographic, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Geographic Book Service. National Geographic Guide to Scenic Highways & Byways. Fifth edition. National geographic, 2018.
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