APA (7th ed.) Citation

Gregg, J. R., Leslie, L. A., & Zoubek, C. Greeg shorthand dictionary.

Chicago Style (17th ed.) Citation

Gregg, John Robert, Louis A. Leslie, and Charles Zoubek. Greeg Shorthand Dictionary.

MLA (8th ed.) Citation

Gregg, John Robert, et al. Greeg Shorthand Dictionary.