APA (7th ed.) Citation

Saez, J. F., & Heeren, H. (1957). Ex Libris Hanns Heern.

Chicago Style (17th ed.) Citation

Saez, Julio Fernandez., and Hanns Heeren. Ex Libris Hanns Heern. 1957.

MLA (9th ed.) Citation

Saez, Julio Fernandez., and Hanns Heeren. Ex Libris Hanns Heern. 1957.

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