Leslie, L. A., Lemaster, A. J., & Zoubek, C. E. (1980). Gregg shorthand for colleges: Series 90. Gregg Division/McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Leslie, Louis A., A. James Lemaster, agus Charles E. Zoubek. Gregg Shorthand for Colleges: Series 90. New York: Gregg Division/McGraw-Hill, 1980.
Lua MLA (9ú heag.)Leslie, Louis A., et al. Gregg Shorthand for Colleges: Series 90. Gregg Division/McGraw-Hill, 1980.
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