Doni Jaya, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2020
Artikel Jurnal
Elgar, Frank
Frederick A Praeger Publishirs, 1958
Buku Teks
Butterfield, Herbert, author
Cambridge University Press, 1969
Buku Teks
Butterfield, Herbert, author
Cambridge University Press, 1955
Buku Teks
Donaldson, Norman
Bowling Green University Popular Press, 1971
Buku Teks