Angel, A. R. (1992). Elementary algebra for college students (3rd ed.). Prentice hall.
Lua i Stíl Chicago (17ú heag.)Angel, Allen R. Elementary Algebra for College Students. 3rd ed. New Jersey: Prentice hall, 1992.
Lua MLA (9ú heag.)Angel, Allen R. Elementary Algebra for College Students. 3rd ed. Prentice hall, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.