Likert, Rensis
New York, McGraw-Hill
Buku Teks
Likert, Rensis
McGraw-Hill, 1961
Buku Teks
edited by David B. Lipsky, Ariel C. Avgar, J. Ryan Lamare
Emerald, 2016
eBooks
Morton Deutsch, Peter T. Coleman
Jossey-Bass Publishers, 2000
Buku Teks
Sheftel, Phoebe A.
[American Society for Training & Development Press, American Society for Training & Development Press], 2001
eBooks