Tyler, L. E. (1971). Tests and measurements (2nd ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Tyler, Leona E. Tests and Measurements. 2nd ed. Englewood Cliffs, N.J.: Prentice-Hall, 1971.
Lua MLA (8ú heag.)Tyler, Leona E. Tests and Measurements. 2nd ed. Prentice-Hall, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.