Walberg, H. J. (1974). Evaluating educational performance: A sourcebook of methods, instruments, and examples. McCutchan Pub.
Lua i Stíl Chicago (17ú heag.)Walberg, Herbert J. Evaluating Educational Performance: A Sourcebook of Methods, Instruments, and Examples. Berkeley, Calif: McCutchan Pub, 1974.
Lua MLA (9ú heag.)Walberg, Herbert J. Evaluating Educational Performance: A Sourcebook of Methods, Instruments, and Examples. McCutchan Pub, 1974.
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