Cita APA (7th ed.)
Thielicke, H. (1972). How to believe again. Fortress Press.
Cita Chicago (17th ed.)
Thielicke, Helmut. How to Believe Again. Philadelphia: Fortress Press, 1972.
Cita MLA (9th ed.)
Thielicke, Helmut. How to Believe Again. Fortress Press, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.