Lary, Diana, author
Cambridge University Press, 2007
Buku Teks
New delhi:Indian Information service, 1951
Buku Teks
Lovett, Frank, author
Cambridge University Press, 2016
eBooks
Christopher Joses Vegas Antoni, author
2019
UI - Skripsi (Membership)
Haryanto Imantaka Nugraha, author
Universitas Indonesia, 2017
UI - Skripsi (Membership)