APA (7th ed.) Citation

Purcell, L. E., & Poulet, C. Wild horses of America.

Chicago Style (17th ed.) Citation

Purcell, L. Edward, and Claude Poulet. Wild Horses of America.

MLA (9th ed.) Citation

Purcell, L. Edward, and Claude Poulet. Wild Horses of America.

Warning: These citations may not always be 100% accurate.