APA (7th ed.) Citation

Bradley, J., Fulton, B., & Helm, M. (2012). Self-Published Books: An Empirical "Snapshot".

Chicago Style (17th ed.) Citation

Bradley, Jana, Bruce Fulton, and Marlene Helm. Self-Published Books: An Empirical "Snapshot". 2012.

MLA (9th ed.) Citation

Bradley, Jana, et al. Self-Published Books: An Empirical "Snapshot". 2012.