APA (7th ed.) Citation

Purkey, W. W., & Strahan, D. B. (2002). Inviting positive classroom discipline. National Middle School Assoc.

Chicago Style (17th ed.) Citation

Purkey, William W., and David B. Strahan. Inviting Positive Classroom Discipline. Westerville, Ohio: National Middle School Assoc, 2002.

MLA (9th ed.) Citation

Purkey, William W., and David B. Strahan. Inviting Positive Classroom Discipline. National Middle School Assoc, 2002.