Pope, David
ASEAN-Australia Joint Research Project , 1985
Buku Teks SO
Willard, Myra
Melbourne University Press, 1923
Buku Teks SO
Rowley, C.D.
Australian National University Press, 1971
Buku Teks SO
edited by Robert W. Tucker, Charles B. Keely and Linda Wrigley
Westview Press, 1992
Buku Teks SO
De Lepervanche, Marie M.
George Allen and Unwin, 1984
Buku Teks SO