Springer, 2012
eBooks
Mulia Aisyah Krife, author
2019
UI - Skripsi Membership
Lloyd, Trevor
British Commonwealth and American Heritage, 1971
Buku Teks
Lloyd, Trevor Owen
American Heritage Press, 1971
Buku Teks
Norris, Pippa, author
NY Cambridge University Press, 2014
Buku Teks