Prien, Erich P., author
Lawrence Erlbaum Associates, 2003
Buku Teks
Hersey, Rexford
Harper , 1955
Buku Teks
edited by Janice McLean
Gale Research, 1991
Buku Referensi
Bayu Perkasa Temadja, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2010
UI - Tesis (Open)
Gendelman, Joel, author
American Society for Training & Development, 2010
eBooks