Ricklefs, Merle Calvin, 1943-
School of Oriental and African Studies. University of London, 1978
Buku Teks
Anderson, John D.
McGraw-Hill, 1982
Buku Teks
R. Gregg Bruce [and others]
Pearson/Prentice Hall, 2004
Buku Teks
Artikel Jurnal
Hoadley, Mason C
Amsterdam University Press, 2019
eBooks