
Starr, Paul (1984). The Social Transformation of American Medicine. Basic Books: Reprint edition (April 1984).
ISBN 0465079350
American Psychological Association. (2001). Publication Manual of the American Psychological Association (5th ed.), Washington, DC: Author.
ISBN 1557987912
Strunk, W., Jr., & White, E. B. (1999). The Elements of Style (4th ed.), New York: Longman.
ISBN 020530902X