Amarina Ashar Ariyanto, author
Fakultas Psikologi Universitas Indonesia, 1999
UI - Laporan Penelitian
Budidarmo Teguh Prakoso, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Skripsi (Membership)
Reeve, Johnmarshall, author
John Wiley & Sons, Inc., 2015
Buku Teks
Prasakti Tenri Fanyiwi, author
Fakultas Psikologi Universitas Indonesia, 2013
UI - Skripsi (Membership)
Schunk, Dale H., author
Prentice-Hall, 1996
Buku Teks