(EN) Joel Achenbach, Captured by Aliens: the search for life and truth in a very large universe, New York, Simon & Schuster., 1999, pp. 95–96, ISBN 0684848562.
«Her interest in science came primarily from her interest in the philosophy of Karl Marx. ... Druyan herself had, at the time, rather vaporous standards of evidence for her many sundry beliefs (as she later acknowledged). She believed ... that Immanuel Velikovsky in the 1950s had correctly deduced the truth about the solar system. ... She believed in the ancient astronauts of Erich von Daniken.»