Byrt
Buku Teks
Byrt, W.J.
McGraw-Hill Book, 1972
Buku Teks
Deutsch, Karl W
Houghton Mifflin, 1970
Buku Teks
Jupp, James
London Melbourne University Press 1964
Buku Teks
Aitkin, Donald Alexander, author
Australian National University Press, 1982
Buku Teks