APA (7th ed.) Citation

Appel, K., & Frankenstein, A. V. (1979). Karel Appel. H. A. Abrams.

Chicago Style (17th ed.) Citation

Appel, Karel, and Alfred V. Frankenstein. Karel Appel. New York: H. A. Abrams, 1979.

MLA (9th ed.) Citation

Appel, Karel, and Alfred V. Frankenstein. Karel Appel. H. A. Abrams, 1979.