Varberg, D. (2007). Calculus Dale Varberg, Edwin J. Purcell, Steven E.Rigdon. Pearson Education.
Lua i Stíl Chicago (17ú heag.)Varberg, Dale. Calculus Dale Varberg, Edwin J. Purcell, Steven E.Rigdon. Pearson Education, 2007.
Lua MLA (8ú heag.)Varberg, Dale. Calculus Dale Varberg, Edwin J. Purcell, Steven E.Rigdon. Pearson Education, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.