APA Citation

 Bhushan, B. (2013).  Introduction to tribology.  John Wiley & Sons.

Chicago Style Citation

 Bhushan, Bharat.  Introduction to Tribology.  John Wiley & Sons, 2013.

MLA Citation

 Bhushan, Bharat.  Introduction to Tribology.  John Wiley & Sons, 2013.

Warning: These citations may not always be 100% accurate.