Baldrige, L. (1993). Letitia baldrige's new complete guide to executive manners. Maxwell Macmillan Internaional.
Lua i Stíl Chicago (17ú heag.)Baldrige, Letitia. Letitia Baldrige's New Complete Guide to Executive Manners. New York: Maxwell Macmillan Internaional, 1993.
Lua MLA (9ú heag.)Baldrige, Letitia. Letitia Baldrige's New Complete Guide to Executive Manners. Maxwell Macmillan Internaional, 1993.
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