Cita APA (7th ed.)

Wickert, U. (1971). Sacramentum unitatis: Ulrich Wickert. de Gruyter.

Cita Chicago (17th ed.)

Wickert, Ulrich. Sacramentum Unitatis: Ulrich Wickert. Berlin [u.a.]: de Gruyter, 1971.

Cita MLA (8th ed.)

Wickert, Ulrich. Sacramentum Unitatis: Ulrich Wickert. de Gruyter, 1971.