PERRY MAJOR G. (2002). RULES AND TOOLS FOR LEADERS. APERIGEE.
Lua i Stíl Chicago (17ú heag.)PERRY MAJOR G. RULES AND TOOLS FOR LEADERS. U.S.A: APERIGEE, 2002.
Lua MLA (9ú heag.)PERRY MAJOR G. RULES AND TOOLS FOR LEADERS. APERIGEE, 2002.
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