Pratt, J. W., Van Deusen, G. G., Perkins, D., & Perkins, B. (1962). The United States of America: A history: Instructor's manual. Macmillan.

Pratt, Julius William, Glyndon G. Van Deusen, Dexter Perkins, and Bradford Perkins. The United States of America: A History: Instructor's Manual. New York: Macmillan, 1962.

Pratt, Julius William, et al. The United States of America: A History: Instructor's Manual. Macmillan, 1962.