LES GIBLIN. (2014). CORE SELLING SKILLS. EMBASSY BOOK.
Lua i Stíl Chicago (17ú heag.)LES GIBLIN. CORE SELLING SKILLS. MUMBAI: EMBASSY BOOK, 2014.
Lua MLA (9ú heag.)LES GIBLIN. CORE SELLING SKILLS. EMBASSY BOOK, 2014.
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