APA (7th ed.) Citation

Hirzel, H. R. C., & Andresen, E. (1901). Ex Libris E. Andresen.

Chicago Style (17th ed.) Citation

Hirzel, Hermann Robert Catumby, and Emmerich Andresen. Ex Libris E. Andresen. [S.l.], 1901.

MLA (9th ed.) Citation

Hirzel, Hermann Robert Catumby, and Emmerich Andresen. Ex Libris E. Andresen. 1901.

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