Gschwandtner, G. (2007). The psychology of sales success: Learn to think like your customer to close every sale. McGraw-Hill.
Styl cytowania ChicagoGschwandtner, Gerhard. The Psychology of Sales Success: Learn to Think Like Your Customer to Close Every Sale. McGraw-Hill, 2007.
Styl cytowania MLAGschwandtner, Gerhard. The Psychology of Sales Success: Learn to Think Like Your Customer to Close Every Sale. McGraw-Hill, 2007.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..