The Vatican:
Encyclical on the Relations of the Church to Non-Christian religions

US Bishops Documents:
The Islamic Tradition
Vatican Council & Papal Statements on Islam
How an Islamic Leader Views Dialogue

What Dialogue Means

How Mary Holds Christians and Muslims in Conversation
The Pillars of Islamic Faith

 

St. Anthony Messenger Press:

For Youth

Truths Jews, Christians and Muslims Hold In Common
Terrorism and War: A Catholic Response

Related Articles: 

The Pope, Muslims, and Terrorism - Catholic News

The Pope, Muslims, and Terrorism - Washington Post