APA (7th ed.) Citation

Fletcher, C. R. L., Walker, E., Butler, H. B., & Bell, C. F. (1909). Historical portraits. Clarendon Press.

Chicago Style (17th ed.) Citation

Fletcher, C. R. L., Emery Walker, Harold Beresford Butler, and Charles Francis Bell. Historical Portraits. Oxford: Clarendon Press, 1909.

MLA (8th ed.) Citation

Fletcher, C. R. L., et al. Historical Portraits. Clarendon Press, 1909.