APA (7th ed.) Citation

Greinacher, N., & Müller, A. (1973). Vorwort. Concilium, 9(4), 231-232.

Chicago Style (17th ed.) Citation

Greinacher, Norbert, and Alois Müller. "Vorwort." Concilium 9, no. 4 (1973): 231-232.

MLA (9th ed.) Citation

Greinacher, Norbert, and Alois Müller. "Vorwort." Concilium, vol. 9, no. 4, 1973, pp. 231-232.