References

"Serengeti - The National Park's Official Site." Serengeti - The National Park's Official Site. N.p., n.d. Web. 27 Nov. 2012. <http://www.serengeti.org/index_discover.html>.  

"Serengeti II: Dynamics, Management, and Conservation of an Ecosystem - Google Books." Google Books. N.p., n.d. Web. 27 Nov. 2012. <http://books.google.com/books?id=YV5Qg2GSyWwC&printsec=frontcover&dq=serengeti+II&hl=en&sa=X&ei=pXG0UNqUFYfOigKmkoHwCg&ved=0CDgQ6AEwAA>. 

"Serengeti III: Human Impacts on Ecosystem Dynamics - Google Books." Google Books. N.p., n.d. Web. 27 Nov. 2012. <http://books.google.com/books?hl=en&lr=&id=YRybBlahRGUC&oi=fnd&pg=PA347&dq=serengeti+park+income+revenue&ots=Zt--gEJoS7&sig=3cLLjG6bqVaKUGYmU1MsOcHMot8#v=onepage&q&f=false>.