Muehl, W. (1986). Why preach ? Why listen ? Fortress.
Cita Chicago (17th ed.)Muehl, William. Why Preach ? Why Listen ? Philadelphia: Fortress, 1986.
Cita MLA (9th ed.)Muehl, William. Why Preach ? Why Listen ? Fortress, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.