Walrec, E.D. van
National countcil for the Netherlands and the Netherlands Indies of the Institute of Pacific Relations, 1935
Buku Teks
Dennett, Tyler
Barnes ,
Buku Teks
Lowe, Peter
Martin's Press , 1969
Buku Teks
Brassey's Publishers, 1978
Buku Teks
Chow, S. R.
Macmillan, 1944
Buku Teks