Adam, Leonhard
Penguin Books, 1949
Buku Teks
Diamond, A. S. (Arthur Sigismund), author
Johnson`s, 1950
Buku Teks
Anderson, Richard, author
Prentice-Hall, 1979
Buku Teks
Firth, Raymond, author
Thomas Nelson and Sons, 1947
Buku Teks
Herskovits, Melville J. (Melville Jean), 1895-1963, author
Alfred A. Knopf, 1949
Buku Teks