According to Quraan & Sunnah
Author: Dr. Ahmed Fareed
ISBN-10: 1874263329
Publisher: Al-Firdous Ltd.
Author: Dr. Abu Ameenah Bilal Philips
ISBN-10: 8172314221
Publisher: Dawah Book Center
Author: Matloob Ahmed Qasmi
ISBN-10: 8174354255
Publisher: Adam Publishers & Distributors
Author: Allamah Muhammad Ibn Sireen (R.A)
ISBN-10: 8172313144
Publisher: Millat Book Center
According to Islamic Inner Tradtions
Author: Muhmmad M.Al-Akili
ISBN-10: 1879405032
Publisher: Pearl Publishing House