APA (7th ed.) Citation

Hill, W. E. (2010). The Pony Express trail: Yesterday and today. Caxton Press.

Chicago Style (17th ed.) Citation

Hill, William E. The Pony Express Trail: Yesterday and Today. Caldwell, Idaho: Caxton Press, 2010.

MLA (9th ed.) Citation

Hill, William E. The Pony Express Trail: Yesterday and Today. Caxton Press, 2010.