edited by G. Goodwin
Cambridge University Press, 1958
Buku Teks
Yale, William, author
The University of Michigan Press, 1958
Buku Teks
Spear, Percival, author
The University of Michigan Press, 1961
Buku Teks
Chicago : University of Chicago Press
Majalah, Jurnal, Buletin
Leahey, Thomas Hardy, author
Prentice-Hall, 2001
Buku Teks