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
Encyclopedia of educational research : fifth edition, volume 4
Harold E. Mitzel, editor-in-chief
Free Press, 1993
 Buku Referensi
Encyclopedia of educational research : sixth edition, volume 4
Marvin C. Alkin, editor-in-chief
MacMillan Library Reference USA, 1992
 Buku Referensi
Phillips, Jack
Level 5 evaluation: mastering ROI: evaluation & research
[American Society for Training and Development Press, American Society for Training and Development Press], 2000
 eBooks
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
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