Armitge, Angus
The New American Library, 1956
Buku Teks
Armitage, Angus
Mentor Books, 1952
Buku Teks
Cambridge University Press , 1989
Buku Teks
Chapman, Robert D., author
W.H. Freeman, 1978
Buku Teks
editor, G.R. Castro and M. Cardona
Springer-Verlag Berlin Heidelberg, 1987
Buku Teks