Arthur, Diane, author
American Management Association, 2000
eBooks
Lewis, Lynn Sparapany, author
American Society for Training & Development, 2008
eBooks
Harral, Stewart, author
University of Oklahama, 1954
Buku Teks
Gillham, Bill, author
Open University Press, 2008
Buku Teks
Gordon, Nathan J., author
Elsevier , 2011
Buku Teks