VERNON, M. (2011). Bisnis the key concepts. Rajawali Pers.
Lua i Stíl Chicago (17ú heag.)VERNON, Mark. Bisnis the Key Concepts. Rajawali Pers, 2011.
Lua MLA (8ú heag.)VERNON, Mark. Bisnis the Key Concepts. Rajawali Pers, 2011.
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