Liles, P., Brendel, L. A., & Krause, R. (1960). Typing mailable letters: Practice projects in placement, punctuation, proofreading, and production. Gregg Pub. Division, McGraw-Hill.
Citace podle Chicago (17th ed.)Liles, Parker, Leroy A. Brendel, a Ruthetta Krause. Typing Mailable Letters: Practice Projects in Placement, Punctuation, Proofreading, and Production. New York: Gregg Pub. Division, McGraw-Hill, 1960.
Citace podle MLA (8th ed.)Liles, Parker, et al. Typing Mailable Letters: Practice Projects in Placement, Punctuation, Proofreading, and Production. Gregg Pub. Division, McGraw-Hill, 1960.
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