APA (7th ed.) Citation

Colton, J., & Colton, S. Thorsons Introductory guide to ridology. Haper Collins.

Chicago Style (17th ed.) Citation

Colton, James, and Sheelagh Colton. Thorsons Introductory Guide to Ridology. London: Haper Collins.

MLA (9th ed.) Citation

Colton, James, and Sheelagh Colton. Thorsons Introductory Guide to Ridology. Haper Collins.

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