Hilty, C. (1959). Was sollen wir tun? Evangelische Verlagsanstalt.
Chicago Style (17. basım) AtıfHilty, Carl. Was Sollen Wir Tun? Berlin: Evangelische Verlagsanstalt, 1959.
MLA (8th ed.) AtıfHilty, Carl. Was Sollen Wir Tun? Evangelische Verlagsanstalt, 1959.
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