Lua APA (7ú heag.)

Gregg, J. R. (1962). Applied secretarial practice (5th ed.). Gregg Pub. Division, McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Gregg, John Robert. Applied Secretarial Practice. 5th ed. New York: Gregg Pub. Division, McGraw-Hill, 1962.

Lua MLA (8ú heag.)

Gregg, John Robert. Applied Secretarial Practice. 5th ed. Gregg Pub. Division, McGraw-Hill, 1962.

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