Chisholm, Roderick M.
Prentice Hall International, 1989
Buku Teks
Minshull, Roger
Hutchinson University Library, 1971
Buku Teks
Finch, John
Sweet & Maxwell, 1974
Buku Teks
Finch, John
Sweet & Maxwell, 1970
Buku Teks
edited by Charles Harrison, Paul Wood and Jason Gaiger
Blackwell, 1998
Buku Teks