Groneman, Chris H., author
McGraw-Hil, 1966
Buku Teks
Love, George, author
Erlangga, 1981
Buku Teks
Norzehan Adli Bin Muhamad ... [and others]
Institut Kraf Negara, 2009
Buku Referensi
Beach, David P., author
Prentice-Hall, 1992
Buku Referensi
Wakefield, Sarah, author
American Society for Training & Development, 2011
eBooks