APA (7th ed.) Citation

Reagan, R., Skinner, K. K., Anderson, A. G., & Anderson, M. (2003). Reagan: A life in letters. Free Press.

Chicago Style (17th ed.) Citation

Reagan, Ronald, Kiron K. Skinner, Annelise Graebner Anderson, and Martin Anderson. Reagan: A Life in Letters. New York: Free Press, 2003.

MLA (9th ed.) Citation

Reagan, Ronald, et al. Reagan: A Life in Letters. Free Press, 2003.