Mackay, Harvey

麥凱銷售聖經 : = 從A到Z, 輕鬆教你賣動全世界 / by: Mackay, Harvey; 麥凱 ((Mackay, Harvey),); 吳國欽, (Language materials, printed)

臨渴掘井 : = 人際網大贏家 / by: Mackay, Harvey; 麥凱 ((Mackay, Harvey),); 詮國翻譯社 (Language materials, printed)