NOVA VISTA PUBLISHING. (2003). WIN -WIN SELLING. NOVA VISTA PUBLISHING.
Chicago-viite (17. p.)NOVA VISTA PUBLISHING. WIN -WIN SELLING. NORTH AMERICA: NOVA VISTA PUBLISHING, 2003.
MLA-viite (9. p.)NOVA VISTA PUBLISHING. WIN -WIN SELLING. NOVA VISTA PUBLISHING, 2003.
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