http://www.sd83.bc.ca/stu/9711/jlk2w6.htm

Ceserani, Gian, Paolo. Grand Constructions. New York: G.P. Putnam's sons, 1982.

"Pyramids." World Book Encyclopedia, 1982.

"Pyramids." Compton’s Encyclopedia, 1997.

"Zeus." World Book Encyclopedia, 1982.

http://unmuseum.mus.pa.us/hangg.htm

http://ce.eng.usf.edu/pharos/wonders/gardens.html

"The Hanging Gardens of Babylon." World Book Encyclopedia, 1982

Caselli, Giovanni. Wonders of the World. New York: Dorling Kindersley Inc., 1992

Caselli, Giovanni. Wonders of the World. New York: Dorling Kindersley Inc., 1992

http://ce.eng.usf.edu/pharos/wonders/artimis.html

http://www.unmuseum.org/maus.htm

http:/cnn.com/TRAVEL/DESTINATIONS/9705/seven.wonders/mausoleum.html

Martell, Hazel. The Kingfisher Book of the Ancient World. New York: Scholastic INC., 1995

http://unmuseum.mus.pa.us/pharos.htm

"Buildings, Tall." The World Almanac and Book of Facts. 1995.

http://www.Paris.org/Monuments/Eiffel/

http://www.atkielski.com/main/EiffelTowerFAQ.html

Nardo, Don. Life in Ancient Greece. San Diego: Lucent Books INC., 1992

http://www.pbs.org/wgbh/nova/sunken/wonders

Kagan, Donald. "Ancient Greece." World Encyclopedia, 1982.

Rosen, Edward. "Ptolemy." World Encyclopedia, 1982.

Harman, John E. "The Empire State Building." World Encyclopedia, 1982

"Sphinx." World Book Encyclopedia, 1982.

"Golden Gate Bridge." World Book Encyclopedia, 1982.

"Golden Gate Bridge." World Book Encyclopedia, 1990.