Service, Robert, author
Cambridge : Massachusetts Harvard University Press, 2003
Buku Teks
Walsh, Warren Bartlett, author
The University of Michigan Press, 1958
Buku Teks
Riasanovsky, Nicholas V., author
Oxford University Press, 1963
Buku Teks
Akhmad Nurismarsyah, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2010
UI - Skripsi Open
Lawrence, John
Farrar Straus & Cudahy, 1959
Buku Teks