貝吉爾 ((Bettger, Frank))

怎樣推銷保險 by: 貝吉爾 ((Bettger, Frank)); Bettger, Frank (Language materials, printed) , [著]

保險大贏家 by: 貝吉爾 ((Bettger, Frank)); Bettger, Frank; 何森隆 (Language materials, printed) , [著]

敗部復活 by: 富蘭克翻譯小組; 貝吉爾 ((Bettger, Frank)); Bettger, Frank (Language materials, printed) , [原著]