GRIFFIN, R. W., & GRIFFIN, R. W. (1996). Business Ricky W. Griffin, Ronald J. Ebert. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)GRIFFIN, Ricky W., agus Ricky W. GRIFFIN. Business Ricky W. Griffin, Ronald J. Ebert. Prentice Hall, 1996.
Lua MLA (8ú heag.)GRIFFIN, Ricky W., agus Ricky W. GRIFFIN. Business Ricky W. Griffin, Ronald J. Ebert. Prentice Hall, 1996.
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