Shaw, Alan George Lewers, author
Longman, Green, 1955
Buku Teks
Boehm, E.A., author
Longman Chesire, 1979
Buku Teks
Boehm, E.A., author
Longman, 1971
Buku Teks
Hill, Hal, 1948-, author
ASEAN-Australia Joint Research Project, 1984
Buku Teks
Arndt, H. W. (Heinz Wolfgang), 1915-2002, author
Australian NAtional University Press, 1972
Buku Teks