Szőnyi, G. E. (2004). John Dee's occultism: Magical exaltation through powerful signs. State University of New York Press.

Szőnyi, György Endre. John Dee's Occultism: Magical Exaltation Through Powerful Signs. Albany: State University of New York Press, 2004.

Szőnyi, György Endre. John Dee's Occultism: Magical Exaltation Through Powerful Signs. State University of New York Press, 2004.