This link will take you to the Chicago Manual of Style (CMOS) online section on Author-Date references. This is the ultimate authority on the Chicago Style. Remember, APSA is fundamentally the Chicago style. The primary exception to CMOS references are below.
Hermann, Margaret G. 1984. “Personality and Foreign Policy Decision Making: A Study of Fifty-Three Heads of Government.” In Foreign Policy Decision Making, eds. Donald A. Sylvan and Steve Chan, 133–52. New York: Praeger.