凱茲 ((Cates, Bill))

市場倍增 : 轉介紹實戰100 by: Cates, Bill; 凱茲 ((Cates, Bill)); 呂允仁 (Language materials, printed) , [作]

好口碑,大訂單! : 建立口耳相傳的銷售網絡,拓展潛在客源的四大獲利策略 by: 凱茲 ((Cates, Bill)); 吳幸玲 (Language materials, printed) , [原著]

我不是祕密 : 贏得顧客推薦的銷售神技 by: Cates, Bill; 凱茲 ((Cates, Bill)); 張書華 (Language materials, printed) , [原著]