APA引文

(2020). Secrets of the National Parks: The expert's guide to the best experiences beyond the tourist trail (Second edition.). National Geographic Society.

Chicago Style (17th ed.) Citation

Secrets of the National Parks: The Expert's Guide to the Best Experiences Beyond the Tourist Trail. Second edition. Washington, D.C.: National Geographic Society, 2020.

MLA引文

Secrets of the National Parks: The Expert's Guide to the Best Experiences Beyond the Tourist Trail. Second edition. National Geographic Society, 2020.

警告：這些引文格式不一定是100％准確.