Haneberg, Lisa, author
American Society for Training & Development, 2011
eBooks
Santayana, George, author
Charles Scribner's Sons, 1945
Buku Teks
Ochsenwald, William, author
McGraw-Hill, 2011
Buku Teks
edited by Hussein Hassan Soliman
Routledge, 2013
Buku Teks
Lewis, Bernard, author
Weidenfeld and Nicolson, 1998
Buku Teks