APA (7th ed.) Citation

Schmidt, E., & Leier, A. (1973). Dr. Axel Leier Ex Libris.

Chicago Style (17th ed.) Citation

Schmidt, Eugen, and Axel Leier. Dr. Axel Leier Ex Libris. Leipzig, 1973.

MLA (9th ed.) Citation

Schmidt, Eugen, and Axel Leier. Dr. Axel Leier Ex Libris. 1973.

Warning: These citations may not always be 100% accurate.