Soegijanto Padmo, author
Dept. of History, Faculty of Letters, Gadjah Mada University with the cooperation with Aditya Media Pub. House, 1999
Buku Teks
Firth, Raymond, author
Routledge & Kegan Paul, 1971
Buku Teks
S. Husin Ali, author
Oxford University Press, 1975
Buku Teks
edited by Jack M. Potter
Little, Brown, 1967
Buku Teks
Redfield, Robert, author
The University of Chicago Press, 1963
Buku Teks