Aptheker, H. (1970). The urgency of Marxist-Christian dialogue (1st Harper Colophon ed.). Harper Colophon Books.
Chicago-viite (17. p.)Aptheker, Herbert. The Urgency of Marxist-Christian Dialogue. 1st Harper Colophon ed. New York: Harper Colophon Books, 1970.
MLA-viite (8. p.)Aptheker, Herbert. The Urgency of Marxist-Christian Dialogue. 1st Harper Colophon ed. Harper Colophon Books, 1970.
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