Lydia, R., and B. R. Kumar. “Socio-Economic Profile of the Union Members in APSRTC:A Case Study of Visakhapatnam City”. American International Journal of Social Science Research, Vol. 3, no. 1, Sept. 2018, pp. 13-21, https://www.cribfb.com/journal/index.php/aijssr/article/view/139.