Hawkins, B. L. (1981). Managerial Communication Brian L Hawkins And Paul Preston. Goodyear Publishing.
Lua i Stíl Chicago (17ú heag.)Hawkins, Brian L. Managerial Communication Brian L Hawkins And Paul Preston. Goodyear Publishing, 1981.
Lua MLA (8ú heag.)Hawkins, Brian L. Managerial Communication Brian L Hawkins And Paul Preston. Goodyear Publishing, 1981.
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