Lua APA (7ú heag.)

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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