NOVA VISTA PUBLISHING. (2003). WIN -WIN SELLING. NOVA VISTA PUBLISHING.
Cita Chicago (17th ed.)NOVA VISTA PUBLISHING. WIN -WIN SELLING. NORTH AMERICA: NOVA VISTA PUBLISHING, 2003.
Cita MLA (9th ed.)NOVA VISTA PUBLISHING. WIN -WIN SELLING. NOVA VISTA PUBLISHING, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.