APA (7th ed.) Citation

McCullough, M. E., Sandage, S. J., & Worthington, E. L. (1997). To forgive is human: How to put your past in the past. InterVarsity Press.

Chicago Style (17th ed.) Citation

McCullough, Michael E., Steven J. Sandage, and Everett L. Worthington. To Forgive Is Human: How to Put Your Past in the Past. Illinois: InterVarsity Press, 1997.

MLA (9th ed.) Citation

McCullough, Michael E., et al. To Forgive Is Human: How to Put Your Past in the Past. InterVarsity Press, 1997.