The World Bank, 2012
Buku Referensi
Pieter Honig, Frans Verdoorn, edited
Board for the Netherlands Indies , 1945
Buku Referensi
Perutz, M.F.
Oxford University Press, 1991
Buku Teks
Collen, Morris F.
[, Springer], 2012
eBooks
Harsja W. Bachtiar, 1934-
Indonesian Institute of Sciences, 1976
Buku Referensi