Barnett, Raymond A.
Precalculus : function and graphs
McGraw-Hill , 2001
 Multimedia
Swokowski, Earl W.
Functions and graphs
Prindle, Weber & Schmidt, 1984
 Buku Teks SO
Swokowski, Earl W.
Precalculus : functions and graphs
Brooks/Cole, 2012
 Buku Teks SO
Spectral radius of graphs / Dragan Stevanovic
Academic Press, 2015
 eBooks
Handbook of mathematical functions with formulas, graphs, and mathematical tables
edited by Milton Abramowitz and Irene A. Stegun
U.S. Government Printing Office, 1967
 Buku Referensi