By Games Gerber

Published by Pearson India Education Service Pvt. Ltd., 2014

By James Gerber

Published by Pearson Education Ltd., 2014

By Dennis R. Appleyar & Alfred J Field, TR.

Published by Mc Graw Hill Education Pvt. Ltd., 3356

By Deminick Salvatore

Published by John Wiley & Sons, 2014

By Kelly-Kate S. Pease

Published by Pearson Education Ltd., 2012

By Frederich L schuman

Published by Kogakusha Co., 1958

By Mahajan

Published by S.Chand and Co., 1964

By Palmer

Published by National Book Foundation, 1986

By Palmer and Perkins

Published by National book foundation, 2004

By Biswaranjan Mohanty

Published by Atlantic Publishers and Distributers Pvt. Ltd., 2010