Hacker, Diana
Bedford Books of St. Martin?s Press, 1995
Buku Teks
Whitney Museum of American Art, 1999
Buku Teks
Beere, Carole A., author
Greenwood Press, 1990
Buku Referensi
Tumin, Melvin M., author
Little, Brown, 1973
Buku Teks
Myrdal, Alva Reimer, 1902-, author
Routledge & Keggan Paul , 1956
Buku Teks