Engineering mathematics/ 
Diego Inocencio Tapang Gillesania. 
 - Third edition. 
 - Philippines:  Diego Inocencio Tapang Gillesania,  2014. 
<br/><br/><label>ISBN: </label>9718614525 
<br/><br/><label>LC Class. No.: </label>QA 401  / .G477 2014