JOHNSON, R. E. (1977). Algebra 1: A-two part course. Addison-wesley pub.
Lua i Stíl Chicago (17ú heag.)JOHNSON, Richard E. Algebra 1: A-two Part Course. California: Addison-wesley pub, 1977.
Lua MLA (9ú heag.)JOHNSON, Richard E. Algebra 1: A-two Part Course. Addison-wesley pub, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.