Stewart, D. W., & Kamins, M. A. (1993). Secondary research: Information sources and methods (2nd ed.). Sage Publications.
Lua i Stíl Chicago (17ú heag.)Stewart, David W., agus Michael A. Kamins. Secondary Research: Information Sources and Methods. 2nd ed. Newbury Park: Sage Publications, 1993.
Lua MLA (8ú heag.)Stewart, David W., agus Michael A. Kamins. Secondary Research: Information Sources and Methods. 2nd ed. Sage Publications, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.