The Master Key System is a personal development book by Charles F. Haanel. Originally a 24 week correspondence course released in 1912, it was published in this book form in 1917. Along with "The Science of Getting Rich", by Wallace D. Wattles, the Master Key System was a primary inspiration for Rhonda Byrne’s book and film "The Secret". Charles F. Haanel was an American author, millionaire, entrepreneur, and businessman who belonged to the American Scientific League and several Masonic societies.
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Ngôn ngữ Anh ● định dạng EPUB ● Trang 251 ● ISBN 9781775411734 ● Nhà xuất bản The Floating Press ● Được phát hành 2009 ● Có thể tải xuống 6 lần ● Tiền tệ EUR ● TÔI 2414733 ● Sao chép bảo vệ Adobe DRM
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