Thielicke, H. (1968). I believe: The Christian's creed. Fortress Press.
Cita Chicago Style (17a ed.)Thielicke, Helmut. I Believe: The Christian's Creed. Philadelphia: Fortress Press, 1968.
Cita MLA (9a ed.)Thielicke, Helmut. I Believe: The Christian's Creed. Fortress Press, 1968.
Precaución: Estas citas no son 100% exactas.