Popham, W. J. (1973). Evaluating instruction. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Popham, W. James. Evaluating Instruction. Englewood Cliffs, N.J.: Prentice-Hall, 1973.
Lua MLA (8ú heag.)Popham, W. James. Evaluating Instruction. Prentice-Hall, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.