Baker, Ann
Cambridge University Press, 1982
Buku Teks SO
Eyres, David J.
Butterworth-Heinemann, 2001
Buku Teks
Hall, Rodney
University of Queensland Press, 1972
Buku Teks SO
Eyres, David John
Butterworth-Heinemann, 2001
Buku Teks SO
Eyres, David John
Butterworth-Heinemann, 2012
Buku Teks SO