APA (7th ed.) Citation

Butler, S., Butler, M., & Howard, D. F. (1962). The correspondence of Samuel Butler with his siter May. Calif. U.P..

Chicago Style (17th ed.) Citation

Butler, Samuel, May Butler, and Daniel Francis Howard. The Correspondence of Samuel Butler with His Siter May. Berkeley: Calif. U.P., 1962.

MLA (8th ed.) Citation

Butler, Samuel, et al. The Correspondence of Samuel Butler with His Siter May. Calif. U.P., 1962.