GOLDMANN HEINZ M. (1993). HOW TO WIN CUSTOMERS. PAN BOOKS LTD.
Cita Chicago (17th ed.)GOLDMANN HEINZ M. HOW TO WIN CUSTOMERS. LONDON: PAN BOOKS LTD, 1993.
Cita MLA (9th ed.)GOLDMANN HEINZ M. HOW TO WIN CUSTOMERS. PAN BOOKS LTD, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.