APA (7th ed.) Citation

Yeats, W. B., Vordtriede, W., & Clemen, U. (1970). Werke. Luchterhand.

Chicago Style (17th ed.) Citation

Yeats, William Butler, Werner Vordtriede, and Ursula Clemen. Werke. Neuwied ; Berlin: Luchterhand, 1970.

MLA (9th ed.) Citation

Yeats, William Butler, et al. Werke. Luchterhand, 1970.