Citazione APA

Perkins, D., & Snell, J. L. (1962). The education of historians in the United States. McGraw-Hill.

Stile di citazione Chicago

Perkins, Dexter, e John L. Snell. The Education of Historians in the United States. New York: McGraw-Hill, 1962.

Citazione MLA

Perkins, Dexter, e John L. Snell. The Education of Historians in the United States. McGraw-Hill, 1962.