APA
Davidoff G., Valette A. & Sarnak P. (2003). Elementary number theory, group theory and Ramanujan graphs. Cambridge: Cambridge Uni Pr.
Chicago
Davidoff Giuliana, Valette Alain and Sarnak Peter. 2003. Elementary number theory, group theory and Ramanujan graphs. Cambridge: Cambridge Uni Pr.
Harvard
Davidoff G., Valette A. and Sarnak P. (2003). Elementary number theory, group theory and Ramanujan graphs. Cambridge: Cambridge Uni Pr.
MLA
Davidoff Giuliana, Valette Alain and Sarnak Peter. Elementary number theory, group theory and Ramanujan graphs. Cambridge: Cambridge Uni Pr. 2003.