Heller, M. E. (1993). La venta profesional. Macchi.
Chicago Style (17th ed.) CitationHeller, Martin E. La Venta Profesional. Buenos Aires: Macchi, 1993.
MLA (8th ed.) CitationHeller, Martin E. La Venta Profesional. Macchi, 1993.
Warning: These citations may not always be 100% accurate.