Encyclopedia of educational research; Volume 4
editor-in-chief, Harold E. Mitzel
Free Press, 1993
 Buku Referensi
Encyclopedia of educational research; Volume 4
editor-in-chief, Marvin C. Alkin
Macmillan Library Reference, 1992
 Buku Referensi
Advances in accounting : a research annual; Vol. 4
edited by Bill N. Schwartz, Philip M.M. Reckers and Arnold Wright
JAI Press, 1987
 Buku Teks SO
Phillips, Jack
Level 5 evaluation: mastering ROI: evaluation & research
[ASTD Press, ASTD Press], 2000
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Phillips, Jack
Level 2 evaluation: learning: evaluation & research
[American Society for Training & Development Press;American Society for Training & Development Press, American Society for Training & Development Press], 2000
 eBooks