Seagraves, Theresa
American Society for Training and Development Press, 2004
eBooks
Tivy, Louis
University of Toronto Press, 1972
Buku Teks SO
Ireland, David
Angus and Roberson Publishers, 1974
Buku Teks SO
Montagu, Mary Wortley
Knopf, 1992
Buku Teks SO
Jelita Anggreini
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2014
UI - Makalah dan Kertas Kerja