Kirby, James, author
Oxford University Press, 2016
eBooks
Butterfield, Herbert, author
Cambridge University Press, 1969
Buku Teks
Butterfield, Herbert, author
Cambridge University Press, 1955
Buku Teks
Nurni Wahyu Wuryandari, author
University of Indonesia, Faculty of Humanities, 2014
Artikel Jurnal
Geyl, Pieter, 1887-1966, author
The World Publishing, 1971
Buku Teks