"PROFILE / Sark / Getting her slice of the 'Prosperity Pie' / Writing 'from the heart' transformed homeless artist into best-selling author" by Suzanne Pullen, www.sfgate.com. May 5, 2002.
Friedrich Nietzsche, Maudemarie Clark, Brian Leiter (1997). “Nietzsche: Daybreak: Thoughts on the Prejudices of Morality”, p.52, Cambridge University Press