Dutton, W. H. (1964). Evaluating pupils: Understanding of arithmetic. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Dutton, Wilbur H. Evaluating Pupils: Understanding of Arithmetic. Englewood Cliffs, N.J: Prentice-Hall, 1964.
Lua MLA (9ú heag.)Dutton, Wilbur H. Evaluating Pupils: Understanding of Arithmetic. Prentice-Hall, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.