APA (7th ed.) Citation

Duquoc, C. (1973). Vorwort. Concilium, 9(11), 603.

Chicago Style (17th ed.) Citation

Duquoc, Christian. "Vorwort." Concilium 9, no. 11 (1973): 603.

MLA (8th ed.) Citation

Duquoc, Christian. "Vorwort." Concilium, vol. 9, no. 11, 1973, p. 603.