APA (7th ed.) Citation

Banning, W., & Banning, G. H. (1930). Six horses. Century.

Chicago Style (17th ed.) Citation

Banning, William, and George Hugh Banning. Six Horses. New York: Century, 1930.

MLA (9th ed.) Citation

Banning, William, and George Hugh Banning. Six Horses. Century, 1930.