editors, Zoe Lacroix, Maria Esther Vidal
Springer-Verlag, 2012
eBooks
Wells, Nicholas
O'Reilly & Associates, Inc, 1999
Multimedia
Dira Almira, author
2018
UI - Skripsi (Membership)
Payne, Robert
William Heinemann, 1947
Buku Teks
Sparkes, Brian A
Routledge, 1996
Buku Teks