Gregg, J. R., Leslie, L. A., & Zoubek, C. E. (1971). Gregg shorthand. McGraw - hill.
Lua i Stíl Chicago (17ú heag.)Gregg, John Robert, Louis A. Leslie, agus Charles E. Zoubek. Gregg Shorthand. New York: McGraw - hill, 1971.
Lua MLA (9ú heag.)Gregg, John Robert, et al. Gregg Shorthand. McGraw - hill, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.