Michael E Auer, Reinhard Langmann
Springer, 2019
Buku Teks
Cheverton, Peter, author
Elex Media Komputindo, 2003
Buku Teks
Emerson, Tricia, author
American Society for Training & Development, 2011
eBooks
Berscheid, Ellen, author
Prentice-Hall, 2005
Buku Teks
Hernowo, author
Kaifa, 2004
Buku Teks