APA (7th ed.) Citation

Allen, D. B. (2004). Formula 2+2: The simple solution for successful coaching. Berrett-Koehler Publishers.

Chicago Style (17th ed.) Citation

Allen, Douglas B. Formula 2+2: The Simple Solution for Successful Coaching. San Francisco: Berrett-Koehler Publishers, 2004.

MLA (9th ed.) Citation

Allen, Douglas B. Formula 2+2: The Simple Solution for Successful Coaching. Berrett-Koehler Publishers, 2004.