Stewart, D. W., & Kamins, M. A. (1993). Secondary research: Information sources and methods (2nd ed.). Sage Publications.

Stewart, David W., and Michael A. Kamins. Secondary Research: Information Sources and Methods. 2nd ed. Newbury Park: Sage Publications, 1993.

Stewart, David W., and Michael A. Kamins. Secondary Research: Information Sources and Methods. 2nd ed. Sage Publications, 1993.