Brandt, Conrad, author
George Allen and Unwin, 1959
Buku Teks
Brandt, Conrad, author
Harvard University Press, 1952, 1959
Buku Teks
Houn, Franklin W.
Prenrice-Hall , 1973
Buku Teks
Schwartz, Benjamin, author
Harvard University Press, 1952, 1961
Buku Teks
Schwartz, Benjamin, author
Harper Torchbooks and The Academy Library, 1967
Buku Teks