APA (7th ed.) Citation

Siber, K., & Skurka, A. (2020). 100 HIKE OF A LIFETIME: The World's Ultimate Science Trails. National Geographic Society.

Chicago Style (17th ed.) Citation

Siber, Kate, and Andrew Skurka. 100 HIKE OF A LIFETIME: The World's Ultimate Science Trails. Washington D.C.: National Geographic Society, 2020.

MLA (9th ed.) Citation

Siber, Kate, and Andrew Skurka. 100 HIKE OF A LIFETIME: The World's Ultimate Science Trails. National Geographic Society, 2020.

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