Haanel, C. F. (2006). The master key system: The complete and unabridged definitive edition of the timeless classic about health, wealth & success. Thinker's Library.
Chicago Style (17th ed.) CitationHaanel, Charles F. The Master Key System: The Complete and Unabridged Definitive Edition of the Timeless Classic About Health, Wealth & Success. Selangor: Thinker's Library, 2006.
MLA (9th ed.) CitationHaanel, Charles F. The Master Key System: The Complete and Unabridged Definitive Edition of the Timeless Classic About Health, Wealth & Success. Thinker's Library, 2006.
Warning: These citations may not always be 100% accurate.