"amphitheater." World History: Ancient and Medieval Eras. ABC-CLIO, 2012. Web. 18 Sept. 2012.
Bix, Amy Sue. "Aqueduct." World Book Advanced. World Book,
2012. Web. 18 Sept. 2012.
Davidson, Frank P., and Kathleen Lusk Brooke. "Background
Essay." World History: Ancient and Medieval Eras. ABC-CLIO, 2012. Web. 17 Sept.
2012.
Ellis, Elisabeth Gaynor., Anthony Esler, and Burton F. Beers.
"Chapter 5." Prentice Hall World History. Upper Saddle River, NJ: Pearson
Prentice Hall, 2007. N. pag. Print.
Emmons, James Tschen. "Colosseum Restoration Plans Stir
Controversy: Background." World History: Ancient and Medieval Eras. ABC-CLIO,
2012. Web. 18 Sept. 2012.
Nice, Alex T. "Rome, Ancient." World Book Advanced. World
Book, 2012. Web. 18 Sept. 2012.
Nice, Alex T. "Rome, Ancient." World Book Advanced. World
Book, 2012. Web. 18 Sept. 2012.
"Roman Aqueducts: Need To Know." World History: Ancient and
Medieval Eras. ABC-CLIO, 2012. Web. 17 Sept. 2012.
Sizgorich, Tom. "Roman Public Baths." World History: Ancient
and Medieval Eras. ABC-CLIO, 2012. Web. 17 Sept. 2012.
Bix, Amy Sue. "Aqueduct." World Book Advanced. World Book,
2012. Web. 18 Sept. 2012.
Davidson, Frank P., and Kathleen Lusk Brooke. "Background
Essay." World History: Ancient and Medieval Eras. ABC-CLIO, 2012. Web. 17 Sept.
2012.
Ellis, Elisabeth Gaynor., Anthony Esler, and Burton F. Beers.
"Chapter 5." Prentice Hall World History. Upper Saddle River, NJ: Pearson
Prentice Hall, 2007. N. pag. Print.
Emmons, James Tschen. "Colosseum Restoration Plans Stir
Controversy: Background." World History: Ancient and Medieval Eras. ABC-CLIO,
2012. Web. 18 Sept. 2012.
Nice, Alex T. "Rome, Ancient." World Book Advanced. World
Book, 2012. Web. 18 Sept. 2012.
Nice, Alex T. "Rome, Ancient." World Book Advanced. World
Book, 2012. Web. 18 Sept. 2012.
"Roman Aqueducts: Need To Know." World History: Ancient and
Medieval Eras. ABC-CLIO, 2012. Web. 17 Sept. 2012.
Sizgorich, Tom. "Roman Public Baths." World History: Ancient
and Medieval Eras. ABC-CLIO, 2012. Web. 17 Sept. 2012.