By W.Durant

Published by Simon and schosler, 1963

By Mahboob ul Haq

Published by Oxford, 1966

By Eugene Silberberg

Published by Chohdri Ghulam Rasool and Sons, 2019

By Ishtiaq Hussain Qureshi

Published by University of Karachi, 1993

By Rfiq Zakaria

Published by Penguin Books, 1988

By Maulvi Abdul Haq

Published on 0

By Ralph Linton

Published by Appleton Century Crofts, 1964

By Silverman H.A.

Published by Pitman and Sons, 1964

By Alpheus T, Mason

Published by Prentice Hall Inc., 1959

By Dr.Rifat Hasan

Published by Iqbal Academy, Pakistan, 1977