Childs, David
Routledge , 1997
Buku Teks SO
Childs, David
Methuen, 1979
Buku Teks SO
Moodie, Graeme C.
Crowell, 1971
Buku Teks SO
edited with an introduction by Richard M. Dalfiume
Quadrangle Books, 1969
Buku Teks SO
Milton-Edwards, Beverly
Routledge, 2003
Buku Teks