APA (7th ed.) Citation

Russell, I. K., & Driggs, H. R. (1923). Hidden heroes of the Rockies. World Book Co..

Chicago Style (17th ed.) Citation

Russell, I. K., and Howard R. Driggs. Hidden Heroes of the Rockies. Yonkers-on-Hudson, N.Y.: World Book Co., 1923.

MLA (8th ed.) Citation

Russell, I. K., and Howard R. Driggs. Hidden Heroes of the Rockies. World Book Co., 1923.

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