Q. Is there an online version of the New Interpreter's Dictionary of the Bible?

Yes, there is. You will find it by going to the Theology & Christian Ministries Subject Guide. Look for the box on the home page called "Where do I start?" You will see a link to the New Interpreter's Dictionary of the Bible, a quick video on how to cite in MLA & APA, and at the bottom of the box there is a link to citing in Chicago/Turabian.