Kallaus, N. F., & Keeling, B. L. (1991). Administrative office management (10th ed.). South-Western Pub. Co..
Citace podle Chicago (17th ed.)Kallaus, Norman Francis, a B. Lewis Keeling. Administrative Office Management. 10th ed. Cincinnati, OH: South-Western Pub. Co., 1991.
Citace podle MLA (9th ed.)Kallaus, Norman Francis, a B. Lewis Keeling. Administrative Office Management. 10th ed. South-Western Pub. Co., 1991.
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