APA (7th ed.) Citation

Garfield, J. A., Brown, H. J., & Williams, F. D. (1967). The diary of James A. Garfield. Michigan State University.

Chicago Style (17th ed.) Citation

Garfield, James A., Harry James Brown, and Frederick D. Williams. The Diary of James A. Garfield. [East Lansing]: Michigan State University, 1967.

MLA (9th ed.) Citation

Garfield, James A., et al. The Diary of James A. Garfield. Michigan State University, 1967.