Gustafson, R. D., & Frisk, P. D. (1994). College algebra (5th ed.). Brooks/Cole Pub. Co..
Lua i Stíl Chicago (17ú heag.)Gustafson, R. David, agus Peter D. Frisk. College Algebra. 5th ed. Pacific Grove, Calif.: Brooks/Cole Pub. Co., 1994.
Lua MLA (9ú heag.)Gustafson, R. David, agus Peter D. Frisk. College Algebra. 5th ed. Brooks/Cole Pub. Co., 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.