Christian Brothers. (1949). The De La Salle arithmetics: A practical course for school and life (1949 Edition.). Brothers of the Christian schools, La Salle Bureau.
Lua i Stíl Chicago (17ú heag.)Christian Brothers. The De La Salle Arithmetics: A Practical Course for School and Life. 1949 Edition. New York: Brothers of the Christian schools, La Salle Bureau, 1949.
Lua MLA (8ú heag.)Christian Brothers. The De La Salle Arithmetics: A Practical Course for School and Life. 1949 Edition. Brothers of the Christian schools, La Salle Bureau, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.