Chambers, R.W. (Robert Warner), author
Oxford University, 1950
Buku Teks
George Allen and Unwin, 1956
Buku Teks
Roderick, Lawson
London Angus & Robertson 1985
Buku Teks
Roderick, Colin, author
Angus & Robertson, 1985
Buku Teks
edited by John L. Bradley and Martin Stevens
Rinehart and Winston, 1968
Buku Teks