Shea, M. (1998). The primacy effect: The ultimate guide to effective personal communications. Orion Business Books.
Lua i Stíl Chicago (17ú heag.)Shea, Michael. The Primacy Effect: The Ultimate Guide to Effective Personal Communications. London: Orion Business Books, 1998.
Lua MLA (9ú heag.)Shea, Michael. The Primacy Effect: The Ultimate Guide to Effective Personal Communications. Orion Business Books, 1998.
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