Wilmshurst, Linda, author
New Jersey, 2005
Buku Teks
Wicks-Nelson, Rita, author
Prentice-Hall, 1997
Buku Teks
Phares, Vicky, author
John Wiley & Sons, 2008
Buku Teks
Mash, Eric J., author
Wadsworth and Cengage Learning, 1999/2010
Buku Teks
Shafira Chairunnisa, author
2018
UI - Skripsi (Membership)