Sergio J. Lee,  2019. <br/><br/>
National Service Training Program :  Civil Welfare Training Service (CWTS) 1 Literacy Training Service (LTS) 1 A Sourbook / 
Sergio J. Lee and Serge Albert C. Tui-Lee. 
 - 4th. 
 - Quezon City :  C and E Publishing,  2019. 
 - Index ;  14 cm. 
<br/><br/><label>ISBN: </label>9789719811589