Ruelius, P. (1995). Mysterium spes: Peter-Felix Ruelius. Echter.
Cita Chicago (17th ed.)Ruelius, Peter-Felix. Mysterium Spes: Peter-Felix Ruelius. Würzburg: Echter, 1995.
Cita MLA (8th ed.)Ruelius, Peter-Felix. Mysterium Spes: Peter-Felix Ruelius. Echter, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.