edited by S.H. Steinberg and John Paxton
MacMillan St Martin's Press, 1969
Buku Referensi
MacMillan St Martin's Press, 1953
Buku Referensi
edited by Brian Hunter
Macmillan, 1991
Buku Referensi
edited by Brian Hunter
Macmillan, 1992
Buku Referensi
YEAR Incorporated, [date of publication not identified]
Buku Teks