Willson, J. D., Roehl-Anderson, J. M., & Bragg, S. M. (2001). Controllership, the work of the managerial accountant (6th ed., 2001 cumulative supplement.). John Wiley & Sons.

Willson, James D., Janice M. Roehl-Anderson, and Steven M. Bragg. Controllership, the Work of the Managerial Accountant. 6th ed., 2001 cumulative supplement. New York, N.Y: John Wiley & Sons, 2001.

Willson, James D., et al. Controllership, the Work of the Managerial Accountant. 6th ed., 2001 cumulative supplement. John Wiley & Sons, 2001.