- AudiobookHow I Raised Myself from Failure to Success in SellingFrank Bettger
- AudiobookHow I Raised Myself From Failure to Success in SellingFrank Bettger
- AudiobookComo Triunfe en las VentasFrank Bettger
- AudiobookHow One Idea Increased My Income and HappinessFrank Bettger
- AudiobookHow One Idea Multiplied My Income and HappinessFrank Bettger