Hungerford, T. W. (2004). Contemporary precalculus. Thomson-Brooks/Cole.
Lua i Stíl Chicago (17ú heag.)Hungerford, Thomas W. Contemporary Precalculus. Belmont, CA: Thomson-Brooks/Cole, 2004.
Lua MLA (9ú heag.)Hungerford, Thomas W. Contemporary Precalculus. Thomson-Brooks/Cole, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.