Gregg, J. R., Fries, A. C., Rowe, M. F., & Travis, D. L. (1968). Applied secretarial practice (6th ed.). Gregg Division, McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Gregg, John Robert, Albert C. Fries, Margaret Forcht Rowe, agus Dorothy L. Travis. Applied Secretarial Practice. 6th ed. New York: Gregg Division, McGraw-Hill, 1968.
Lua MLA (8ú heag.)Gregg, John Robert, et al. Applied Secretarial Practice. 6th ed. Gregg Division, McGraw-Hill, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.