APA (7th ed.) Citation

Theophilus, c. a. R., Hawthorne, J. G., & Smith, C. S. (1963). On divers arts: The treatise of Theophilus. University of Chicago Press.

Chicago Style (17th ed.) Citation

Theophilus, called also Rugerus, John G. Hawthorne, and Cyril Stanley Smith. On Divers Arts: The Treatise of Theophilus. [Chicago]: University of Chicago Press, 1963.

MLA (9th ed.) Citation

Theophilus, called also Rugerus, et al. On Divers Arts: The Treatise of Theophilus. University of Chicago Press, 1963.