Gahbauer, F. (1998). Zeno, Kaiser: Ferdinand Gahbauer OSB. Herder.
Cita Chicago (17th ed.)Gahbauer, Ferdinand. Zeno, Kaiser: Ferdinand Gahbauer OSB. Freiburg [u.a.]: Herder, 1998.
Cita MLA (8th ed.)Gahbauer, Ferdinand. Zeno, Kaiser: Ferdinand Gahbauer OSB. Herder, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.