APA (7th ed.) Citation

Feil, O., & Bock, K. (1960). [Ekslibris] Karl Bock.

Chicago Style (17th ed.) Citation

Feil, Otto, and Karl Bock. [Ekslibris] Karl Bock. [S.l, 1960.

MLA (9th ed.) Citation

Feil, Otto, and Karl Bock. [Ekslibris] Karl Bock. 1960.

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