Tape recording (November 18, 1977) to be played in the event of his assassination as quoted in Randy Shilts "The Mayor of Castro Street: The Life and Times of Harvey Milk" (p. 277), 1982.
Rivka Horwitz, Martin Buber (1988). “Buber's way to "I and thou": the development of Martin Buber's thought and his "Religion as presence" lectures”, Jewish Pubn Society