Gregg, J. R., Leslie, L. A., Rader, C., & Zoubek, C. E. (1960). Gregg shorthand. Gregg Division, McGraw-Hill.

Gregg, John Robert, Louis A. Leslie, Charles Rader, and Charles E. Zoubek. Gregg Shorthand. New York: Gregg Division, McGraw-Hill, 1960.

Gregg, John Robert, et al. Gregg Shorthand. Gregg Division, McGraw-Hill, 1960.