AVERY, G. (1990). Psychology At Work Gayle Avery. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)AVERY, Gayle. Psychology At Work Gayle Avery. Prentice Hall, 1990.
Lua MLA (8ú heag.)AVERY, Gayle. Psychology At Work Gayle Avery. Prentice Hall, 1990.
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