Gardner, Helen, author
Harcourt, Brace and World, 1959
Buku Teks
Munsterberg, Hugo, 1916-1995, author
Philosophical Library, [1949]
Buku Teks
Redstone, Louis G.
New York: McGraw-Hill, 1981
Buku Teks
Chamberlin, Marry W., author
American Library Association, 1959
Buku Referensi
Adam, Leonhard
Penguin Books, 1949
Buku Teks