Tyler, L. E., & Walsh, W. B. (1979). Tests and measurements (3rd edition.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Tyler, Leona E., agus W. Bruce Walsh. Tests and Measurements. 3rd edition. Englewood Cliffs, NJ: Prentice Hall, 1979.
Lua MLA (9ú heag.)Tyler, Leona E., agus W. Bruce Walsh. Tests and Measurements. 3rd edition. Prentice Hall, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.