APA (7th ed.) Citation

(1968). Sunset discovery trips in the Rockies ([1st ed.].). Lane Books.

Chicago Style (17th ed.) Citation

Sunset Discovery Trips in the Rockies. [1st ed.]. Menlo Park, Calif.: Lane Books, 1968.

MLA (9th ed.) Citation

Sunset Discovery Trips in the Rockies. [1st ed.]. Lane Books, 1968.