Davidoff, G. P., Sarnak, P., & Valette, A. (2003). Elementary number theory, group theory, and Ramanujan graphs. Cambridge University Press.
Chicago Edition CitationDavidoff, Giuliana P., Peter Sarnak, and Alain Valette. Elementary Number Theory, Group Theory, and Ramanujan Graphs. New York: Cambridge University Press, 2003.
MLA Edition CitationDavidoff, Giuliana P., et al. Elementary Number Theory, Group Theory, and Ramanujan Graphs. Cambridge University Press, 2003.
Warning: These citations may not always be 100% accurate.