Discrete mathematics with graph theory by Goodaire, Edgar G., Parmenter, Michael M.

Discrete and combinatorial mathematics an applied introduction by Grimaldi, Ralph P.

Available for University of the Philippines Diliman College of Engineering via e-Textbook Reserves under Vital Source. Click here to access
Also available remotely for University of the Philippines Diliman College of Engineering. Click here to access thru Remote Access via EZProxy