Charles F. Haanel, Donald Gordon Carty (2013). “The Master Key System: 2nd Edition: Open the Secret to Health, Wealth and Love, 24 Lesson Workbook”, p.42, Lulu Press, Inc
H.P. Lovecraft, Digital Papyrus (2014). “H.P. Lovecraft: The Ultimate Collection (160 Works Including Early Writings, Fiction, Collaborations, Poetry, Essays & Bonus Audiobook Links)”, p.1753, eBookIt.com