APA (7th ed.) Citation

Eckhardt, W., Eckhardt, W., & Eckhardt, W. (1977). Studien zu Erasmus Habermel.

Chicago Style (17th ed.) Citation

Eckhardt, Wolfgang, Wolfgang Eckhardt, and Wolfgang Eckhardt. Studien Zu Erasmus Habermel. 1977.

MLA (9th ed.) Citation

Eckhardt, Wolfgang, et al. Studien Zu Erasmus Habermel. 1977.