Duffy, J. P. (1994). How to earn a college degree without going to college (2nd ed.). Wiley.
Lua i Stíl Chicago (17ú heag.)Duffy, James P. How to Earn a College Degree Without Going to College. 2nd ed. New York: Wiley, 1994.
Lua MLA (9ú heag.)Duffy, James P. How to Earn a College Degree Without Going to College. 2nd ed. Wiley, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.