APA (7th ed.) Citation

Ryan, M. W., Spitz, J., & Jacksier, B. (2002). The ultimate bath. Publications International.

Chicago Style (17th ed.) Citation

Ryan, Mary Wynn, John Spitz, and Barbara Jacksier. The Ultimate Bath. Lincolnwood, IL: Publications International, 2002.

MLA (8th ed.) Citation

Ryan, Mary Wynn, et al. The Ultimate Bath. Publications International, 2002.