Barnett, R. A., & Ziegler, M. R. (1993). College algebra: Raymond A. Barnett, Michael R. Ziegler (5th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Barnett, Raymond A., agus Michael R. Ziegler. College Algebra: Raymond A. Barnett, Michael R. Ziegler. 5th ed. New York: McGraw-Hill, 1993.
Lua MLA (8ú heag.)Barnett, Raymond A., agus Michael R. Ziegler. College Algebra: Raymond A. Barnett, Michael R. Ziegler. 5th ed. McGraw-Hill, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.