Gregg, J. R., Leslie, L. A., Zoubek, C. E., & Rader, C. (1963). Gregg shorthand: Functional method. Gregg Pub. Division, McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Gregg, John Robert, Louis A. Leslie, Charles E. Zoubek, agus Charles Rader. Gregg Shorthand: Functional Method. New York: Gregg Pub. Division, McGraw-Hill, 1963.
Lua MLA (8ú heag.)Gregg, John Robert, et al. Gregg Shorthand: Functional Method. Gregg Pub. Division, McGraw-Hill, 1963.
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