Ebert, R. J., & Ebert, R. J. (1998). Business Essentials Ronald J. Ebert, Ricky W. Griffin. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Ebert, Ronald J., agus Ronald J. Ebert. Business Essentials Ronald J. Ebert, Ricky W. Griffin. Prentice-Hall, 1998.
Lua MLA (8ú heag.)Ebert, Ronald J., agus Ronald J. Ebert. Business Essentials Ronald J. Ebert, Ricky W. Griffin. Prentice-Hall, 1998.
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