APA (7th ed.) Citation

Grady, M. L. (2004). 20 biggest mistakes: Principals make and how to avoid them. Corwin Press.

Chicago Style (17th ed.) Citation

Grady, Marilyn L. 20 Biggest Mistakes: Principals Make and How to Avoid Them. Thousand Oaks, California: Corwin Press, 2004.

MLA (8th ed.) Citation

Grady, Marilyn L. 20 Biggest Mistakes: Principals Make and How to Avoid Them. Corwin Press, 2004.