Keeling, B. L., Burnham, K., Kallaus, N. F., & Ruprecht, M. M. (1996). Administrative office management (11th ed.). South-Western Educational Pub..
Lua i Stíl Chicago (17ú heag.)Keeling, B. Lewis, Kent Burnham, Norman Francis Kallaus, agus Mary M. Ruprecht. Administrative Office Management. 11th ed. [Cincinnati, Ohio]: South-Western Educational Pub., 1996.
Lua MLA (9ú heag.)Keeling, B. Lewis, et al. Administrative Office Management. 11th ed. South-Western Educational Pub., 1996.
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