In Spartan Search Advanced Search:

• Choose "Subject" in drop down menu 
• Type atonement in search box
• Check box next to "Only return peer-reviewed articles"

More Resources

Browse the stacks: 232.3 (second floor) Atonement     from The Cambridge Dictionary                        of Christian Theology ebrary    Hint: Click on "Religion" before entering                        your search. JSTOR     Hint: In advanced search, choose "item title"                        from drop-down menu. You may want to                        include the theory of atonement in the                        next box, but leave the search type on                        full-text.

Cite Resources

• MLA Formatting and Style Guide (The OWL at Purdue)
• MLA Style (dianahacker.com)