Whitw
Buku Teks
Rae, Leslie
Bhuana Ilmu Populer, 2005
Buku Teks
Wircenski, Jerry L.
American Society for Training and Development Press, 2005
eBooks
Rotondo, Jennifer
McGraw-Hill, 2002
Buku Teks
by Association for Investment Management and Research
AIMR , 1993
Buku Teks