DUTTON, W. H., PETRIE, C. C., & ADAMS, L. (1970). Arithmetic for teachers.-- Ed. 2. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)DUTTON, Wilbur H., Colin C. PETRIE, agus L.J ADAMS. Arithmetic for Teachers.-- Ed. 2. New Jersey: Prentice-Hall, 1970.
Lua MLA (9ú heag.)DUTTON, Wilbur H., et al. Arithmetic for Teachers.-- Ed. 2. Prentice-Hall, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.