Lukasz Wiszniewski, author
TASK, 2017
Artikel Jurnal
edited by John E. Estes and Leslie W. Senger
Hamilton, 1974
Buku Teks
Tobey, Deborah Davis, author
American Society for Training & Development, 2007
eBooks
Dorota Grygoruk, author
TASK, 2017
Artikel Jurnal
Pratt, Brian, author
Oxfam, 1992
Buku Teks