APA (7th ed.) Citation

Sterling, E. M., & Spring, I. (1967). Trips and trails. The Mountaineers.

Chicago Style (17th ed.) Citation

Sterling, E. M., and Ira Spring. Trips and Trails. Seattle: The Mountaineers, 1967.

MLA (9th ed.) Citation

Sterling, E. M., and Ira Spring. Trips and Trails. The Mountaineers, 1967.