Stewart, D. W., & Kamins, M. A. (1993). Secondary research: Information sources and methods (2nd ed.). Sage Publications.
Chicago-viite (17. p.)Stewart, David W., ja Michael A. Kamins. Secondary Research: Information Sources and Methods. 2nd ed. Newbury Park: Sage Publications, 1993.
MLA-viite (8. p.)Stewart, David W., ja Michael A. Kamins. Secondary Research: Information Sources and Methods. 2nd ed. Sage Publications, 1993.
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