Cohen, D. (1993). Algebra and trigonometry (3rd ed.). West Pub. Co..
Lua i Stíl Chicago (17ú heag.)Cohen, David. Algebra and Trigonometry. 3rd ed. Minneapolis/St. Paul: West Pub. Co., 1993.
Lua MLA (9ú heag.)Cohen, David. Algebra and Trigonometry. 3rd ed. West Pub. Co., 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.