Budi Djatmiko, author
STEMBI-Bandung Business School, 2011
Buku Teks
Angell, Pamela, author
McGraw-Hill, 2004
Buku Teks
Munter, Mary, author
Prentice-Hall, 1982
Buku Referensi
Angell, Pamela, author
McGraw-Hill Irwin, 2007
Buku Teks
Houghton Miffiln, 1980
Buku Teks