By Robert A Alberty

Published by John Wiley and Sons, 1983

By Dr. Ghulam Nabi and others

Published by Ilmi Kitab khana, 1989

By B.A.Khokhar

Published by Ilmi Kitab Khana, 1991

By DVS Jain and SP Jauhar

Published by Tata McGraw-Hill publishing co. ltd., 1988

By S.K.Dogra and S. Dogra

Published by Wiley eastern ltd, 1988

By Alonso Finn

Published by Sang e meel publications, 1986

By Paul A Trpler

Published by CBS Publishers and distributors, 1989

By Robert Hutchings

Published by University of Bath, 2000

By E.J.Wenham and others

Published by English language book society/longman, 1988

By purcell Edward M

Published by McGraw Hill