Islam - the religious system established through the prophet Muhammad; the Muslim religion; the body of Muslims, the Muslim world.
Source: Shorter Oxford English Dictionary, Ref PE 1635 .S47 2002
“The Church regards with esteem also the Moslems. They adore the one God, living and subsisting in Himself; merciful and all-powerful, the Creator of heaven and earth, who has spoken to men; they take pains to submit wholeheartedly to even His inscrutable decrees, just as Abraham, with whom the faith of Islam takes pleasure in linking itself, submitted to God. Though they do not acknowledge Jesus as God, they revere Him as a prophet. They also honor Mary, His virgin Mother; …they value the moral life and worship God especially through prayer, almsgiving and fasting.”
Nostra Aetate #3
Nostra Aetate (Latin: In our Age) is the Declaration on the Relation of the Church with Non-Christian Religions of the Second Vatican Council. Passed by a vote of 2,221 to 88 of the assembled bishops, this declaration was promulgated on October 28, 1965, by Pope Paul VI.
New Encyclopedia of Islam
The Cambridge Companion to Muhammad
The Cambridge companion to the Qurʼān
Oxford History of Islam by 
The Dome of the Rock by 
Historical dictionary of the crusades by 
The new encyclopedia of Islam by 
Encyclopedia of Islam and the Muslim world [electronic resource] by 
The Koran handbook: an annotated translation by 
The Blackwell companion to the Qurʼān / edited by Andrew Rippin.
Historical atlas of Islam / by Malise Ruthven ; with Azim Nanji.Islam
