Burnet, Macfarlane
St. Martin's Press, 19770
Buku Teks
Tivy, Joy, author
Oliver and Boyd, 1981
Buku Teks
Richardson, W. Norman, author
Macmillan, 1976
Buku Teks
Sobo, Elisa J., author
Routledge, 2016
Buku Teks
Boughey, Arthur S., author
McMillan Publisher, 1975
Buku Teks