Kotter, John P., 1947-, author
Prenhallindo, 1997
Buku Teks
Waitley, Denis, author
Binarupa Aksara, 1996
Buku Teks
Cleaver, Joanne, 1958-, author
McGraw-Hill, 2012
Buku Teks
Tracy, Brian, author
John Wiley & Sons, 2002
Buku Teks
Hadary, Sharon, author
2013
Buku Teks