P. Anil Kumar  <br/><br/>
Pioneers of Social Reform Movement in Kerala  
By P. Anil Kumar  
 - Tiruchirapalli:   St.Joseph's College,   April 2022 
 - Pages 46-55 
<br/><br/>1. Sri Vaikunda Swamikal <br/>2. Sri Narayana Guru <br/>3.  Ayyankali<br/>4. Sri Narayana Dharma Paripalana Yogam <br/>5. Sri Service Society <br/>6. Sadhu Jana Paripalana Yogam