EBERT, R. J., & EBERT, R. J. (2005). Business essentialsRonald J. Ebert, Ricky W. Griffin. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)EBERT, Ronald J., agus Ronald J. EBERT. Business EssentialsRonald J. Ebert, Ricky W. Griffin. Prentice Hall, 2005.
Lua MLA (8ú heag.)EBERT, Ronald J., agus Ronald J. EBERT. Business EssentialsRonald J. Ebert, Ricky W. Griffin. Prentice Hall, 2005.
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