Ellen Friedman - The Ethics of a Dual Relationship Psychotherapist and Wiccan Clergy
Ellen Friedman - As Above So Below A System of Value Based Ethics for Wiccan Clergy
Aleister Crowley - Greater Ritual Of The Pentagram
Order of Nine Angles - Hebdomadry (Exeatic Way of The Order of Nine Angles)
Aleister Crowley - The Soul of the Desert
Eduard von Hartmann - Geschichte der Metaphysik (1899,in German)