APA (7th ed.) Citation

Wentworth, E. N. (1948). Southwest cattle empires. [publisher not identified].

Chicago Style (17th ed.) Citation

Wentworth, Edward N. Southwest Cattle Empires. [Place of publication not identified]: [publisher not identified], 1948.

MLA (9th ed.) Citation

Wentworth, Edward N. Southwest Cattle Empires. [publisher not identified], 1948.