References to verse 42:18

Book	Reference
The Essence of Islam – Volume I	15 al-Shura, 42:18 [Publisher]
The Holy War	9 Surah ash-Shura, 42:18 [Publisher]
The Life & Character of the Seal of Prophets - Volume II	3 Luqmān (31:11-12), Ash-Shūrā (42:11-20)