APA (7th ed.) Citation

Hals, F., & Trivas, N. S. (1942). The paintings of Frans Hals. Oxford university press.

Chicago Style (17th ed.) Citation

Hals, Frans, and Numa S. Trivas. The Paintings of Frans Hals. New York: Oxford university press, 1942.

MLA (9th ed.) Citation

Hals, Frans, and Numa S. Trivas. The Paintings of Frans Hals. Oxford university press, 1942.