NGS Style Manual‎ > ‎- K -‎ > ‎

Koran, Koranic, Quran, Quranic

NG preferred spelling is Quran (exception to Merriam-Webster's). 

Use Koran spelling only if preferred by a specific organization or in a title or name. 

Set in roman.

Citations appear as follows:
            In the Quran (XXXVII:20-44) it says...
            Quran, Sura XLIX: 13