Derek Bok (2009). “Our Underachieving Colleges: A Candid Look at How Much Students Learn and Why They Should Be Learning More”, p.8, Princeton University Press
D. James Kennedy (1997). “The Gates of Hell Shall Not Prevail: The Attack on Christianity and What You Need to Know to Combat It”, Nelson Reference & Electronic Publishing
Bernie Sanders during Democratic Presidential Candidates Debate at the University of New Hampshire in Durham, New Hampshire, www.nytimes.com. February 5, 2016.