Semmler, Clement
Longman Group, 1969
Buku Teks
Semmler, Clement
Oxford University Press, 1972
Buku Teks
Semmler, Clement
University of Queensland Press [distributed by International Scholarly Book Services, 1972
Buku Teks
Greenlees, Ian
Longman Group, 1971
Buku Teks
Stewart, Douglas Alexander, 1913-
The Australian Broadcasting Commision, 1977
Buku Teks