APA (7th ed.) Citation

Summerhays, R. S. (1948). The observer's book of horses and ponies. F. Warne.

Chicago Style (17th ed.) Citation

Summerhays, R. S. The Observer's Book of Horses and Ponies. London ; New York: F. Warne, 1948.

MLA (9th ed.) Citation

Summerhays, R. S. The Observer's Book of Horses and Ponies. F. Warne, 1948.