APA (7th ed.) Citation

Allison, K., & Day, C. (1999). A guide to plants poisonous to horses. J.A. Allen.

Chicago Style (17th ed.) Citation

Allison, Keith, and Christopher Day. A Guide to Plants Poisonous to Horses. London: J.A. Allen, 1999.

MLA (9th ed.) Citation

Allison, Keith, and Christopher Day. A Guide to Plants Poisonous to Horses. J.A. Allen, 1999.