APA (7th ed.) Citation

Willoughby, D. P. (1974). The empire of Equus. A. S. Barnes.

Chicago Style (17th ed.) Citation

Willoughby, David P. The Empire of Equus. South Brunswick: A. S. Barnes, 1974.

MLA (9th ed.) Citation

Willoughby, David P. The Empire of Equus. A. S. Barnes, 1974.