Laor, E., Carr, M., & Sonntag, J. (1967). A New Sense of Purpose. Four letters to the Jews. Jewish Literary Publications.

Laor, Eran, Maurice Carr, and Jacob Sonntag. A New Sense of Purpose. Four Letters to the Jews. London: Jewish Literary Publications, 1967.

Laor, Eran, et al. A New Sense of Purpose. Four Letters to the Jews. Jewish Literary Publications, 1967.