APA (7th ed.) Citation

Holt, J. C., & Sheffer, S. (1990). Selected letters of John Holt. Ohio State University Press.

Chicago Style (17th ed.) Citation

Holt, John Caldwell, and Susannah Sheffer. Selected Letters of John Holt. Columbus: Ohio State University Press, 1990.

MLA (9th ed.) Citation

Holt, John Caldwell, and Susannah Sheffer. Selected Letters of John Holt. Ohio State University Press, 1990.