Singal Asha Rani...(et.al). <br/><br/>
Ganit: Madhyamik kakshaon ke liye, Bhag 2, Khand 2 (Kaksha 7th ki patthyapustak) 
NCERT (Delhi India) 
 - Delhi, India  NCERT   1989 
 - vii,380p 
<br/><br/><label>Source: </label>Textual