APA (7th ed.) Citation

Gregg, J. R. (1916). Gregg shorthand: Key to Progressive exercises (New ed., rev.). Gregg Pub. Co..

Chicago Style (17th ed.) Citation

Gregg, John Robert. Gregg Shorthand: Key to Progressive Exercises. New ed., rev. New York : Chicago [etc.]: Gregg Pub. Co., 1916.

MLA (8th ed.) Citation

Gregg, John Robert. Gregg Shorthand: Key to Progressive Exercises. New ed., rev. Gregg Pub. Co., 1916.