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