Buffett, M., & Clark, D. (2012). Warren Buffett's Management Secrets: Proven Tools for Personal and Business Success. Simon & Schuster UK Ltd.
Lua i Stíl Chicago (17ú heag.)Buffett, Mary, agus David Clark. Warren Buffett's Management Secrets: Proven Tools for Personal and Business Success. London: Simon & Schuster UK Ltd, 2012.
Lua MLA (9ú heag.)Buffett, Mary, agus David Clark. Warren Buffett's Management Secrets: Proven Tools for Personal and Business Success. Simon & Schuster UK Ltd, 2012.
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