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Casa Battlo. [online] http://www.GreatBuildings.com/buildings/Casa_Batllo.html.

Coconino County. [online] http://www.krazy.com.

Dr. Seuss. The Cat in the Hat. Boston: Houghton Mifflin, 1957.

---. Green Eggs and Ham. New York: Random House, 1960.

---. Hop on Pop. New York: Random House, 1963.

---. Horton Hears a Who!. New York: Random House, 1954.

---. If I Ran the Circus. New York: Random House, 1956.

---. One Fish, Two Fish, Red Fish, Blue Fish. New York: Random House 1960.

---. The Sneetches and Other Stories. New York: Random House, 1961.

---. Yertle the Turtle and Other Stories. New York: Random House, 1950.

The Dr. Seuss Web Page. [online] http://www.seuss.org. David Bedno, Nov. 2000.

Epstein, Connie C. The Art of Writing for Children. Hamden, CT: Archon Books, 1991.

Gluyas Williams Gallery. [online] http://www.sweaterthieves.com/gw.

Lacy, Lyn Ellen. Art and Design in Children's Picture Books. 1986.

Macdonald, Ruth K. Dr. Seuss. Boston: Twayne Publishers, 1988.

M.C. Escher: The Official Site. [online] http://www.mcescher.com.

Minear, Richard. Dr. Seuss Goes to War. New York: New Press, 1999.

Morgan, Judith & Neil. Dr. Seuss & Mr. Geisel. New York: Da Capo Press, 1995.

Nel, Philip. Dr. Seuss: American Icon. New York: Continuum, 2004.

Political Dr. Seuss, The. Dir. Ron Lamothe. Terra Incognita Films, 2004.

Rube Goldberg Gallery. [online] http://www.rube-goldberg.com/html/gallery.htm.

Seussville. [online] http://www.seussville.com. Dr. Seuss Enterprises, 2003.

Snyder, C.R. Coping with Stress. New York: Oxford U. Press, 2001.