APA (7th ed.) Citation

Diehl, C., & Bell, H. W. (1927). Byzantine portraits. A. A. Knopf.

Chicago Style (17th ed.) Citation

Diehl, Charles, and Harold Wilmerding Bell. Byzantine Portraits. New York: A. A. Knopf, 1927.

MLA (9th ed.) Citation

Diehl, Charles, and Harold Wilmerding Bell. Byzantine Portraits. A. A. Knopf, 1927.