APA (7th ed.) Citation

Krahl, E. A., & Forsmann, H. (1904). Ex Libris Helenae Forsmann.

Chicago Style (17th ed.) Citation

Krahl, Ernst August, and Helena Forsmann. Ex Libris Helenae Forsmann. [S. l, 1904.

MLA (9th ed.) Citation

Krahl, Ernst August, and Helena Forsmann. Ex Libris Helenae Forsmann. 1904.

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