Which of the following citations should come first on a works cited page?

ATalcott, Richard. "Great Comets." Astronomy. 2004. Print.
BLesko, Leonard H. "Pyramids." The World Book Encyclopedia. 2001. Print.
CBrinkley, Alan. The Unfinished Nation. New York: Knopf, 1993. Print.
DCarpenter, Allan. Facts About the Cities. New York: Wilson, 1992. Print.