APA (7th ed.) Citation

Hough, E. The Passing of the Frontier: A Chronicle of the Old West.

Chicago Style (17th ed.) Citation

Hough, Emerson. The Passing of the Frontier: A Chronicle of the Old West.

MLA (9th ed.) Citation

Hough, Emerson. The Passing of the Frontier: A Chronicle of the Old West.

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