APA (7th ed.) Citation

Warren, R. P., Perkins, J. A., & Hendricks, R. (2015). Selected Letters of Robert Penn Warren: Toward Sunset, at a Great Height, 1980-1989. Project Muse.

Chicago Style (17th ed.) Citation

Warren, Robert Penn, James A. Perkins, and Randy Hendricks. Selected Letters of Robert Penn Warren: Toward Sunset, at a Great Height, 1980-1989. Baltimore, Maryland: Project Muse, 2015.

MLA (8th ed.) Citation

Warren, Robert Penn, et al. Selected Letters of Robert Penn Warren: Toward Sunset, at a Great Height, 1980-1989. Project Muse, 2015.