африкийн алтан тээрэм үйлдвэрлэдэг Алтан Дэйл Карнеги by Dale Carnegie. Dale Breckenridge Carnegie (originally Carnagey until 1922 and possibly somewhat later) (November 24, 1888 – November 1, 1955) was an American writer and lecturer and the developer of famous courses in self-improvement ...