Nugent, Nicholas
In Print Publishing, 1996
Buku Teks
Veit, Lawrence A., author
McGraw-Hill, 1976
Buku Teks
Flavin, Christopher, author
Earthscan Publications, 1995
Buku Teks
Rodan, Garry, author
Asean-Australia Joint Research Project , 1985
Buku Teks
Kallay, Nicholas
Columbia University Press, 1954
Buku Teks