Anissa Maharani, author
2018
UI - Skripsi (Membership)
Rika Fauziah, author
2019
UI - Tesis (Membership)
Windell, James, author
Macmillan, 1996
Buku Teks
Colin, Virginia L
McGraw-Hill , 1996
Buku Teks
Keenan, Thomas, author
Sage Publications, 2004
Buku Teks