APA (7th ed.) Citation

Orlik, E., Meyer, A., & Meyer, E. (1932). Ex Libris Ernst Anna Meyer.

Chicago Style (17th ed.) Citation

Orlik, Emil, Anna Meyer, and Ernst Meyer. Ex Libris Ernst Anna Meyer. 1932.

MLA (9th ed.) Citation

Orlik, Emil, et al. Ex Libris Ernst Anna Meyer. 1932.