By Mullapudi Venkata Ramana
By A.G.Krishnamurthy (A.G.K.)
By P.V.Sunil Kumar
By Jammi Koneti Rao
By Ken Blanchard, Spencer Johnson And Translated By Pasupuleti Geeta
By Prem Siddardh
By Balabhadrpatruni Ramani
By Nanullapalli Bhaskararao , Mudunuru
By A.N.Jagannadha Sarma
By Nagavalli Siva
By Tummalapalli Ramalingewararao
By Rangavajjala Muralidhara Rao
By Dr. P.V.G. Mahadev
By Kappaganthu Ramakrishna
By Muttareddy Vengala Reddy
By Muthareddi Vengalareddi
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