APA (7th ed.) Citation

Colby, C. B. (1971). Park ranger: Equipment, training, and work of the national park rangers (New and rev.). Coward, McCann & Geoghegan.

Chicago Style (17th ed.) Citation

Colby, C. B. Park Ranger: Equipment, Training, and Work of the National Park Rangers. New and rev. New York: Coward, McCann & Geoghegan, 1971.

MLA (8th ed.) Citation

Colby, C. B. Park Ranger: Equipment, Training, and Work of the National Park Rangers. New and rev. Coward, McCann & Geoghegan, 1971.