1. Two Faces of Power;Bachrach;American Political Science Review,1962
2. Group Discussion and Cooperation in Social Dilemmas;Bouas;Personality and Social Psychology Bulletin,1996
3. Carnevale , Anthony P. Jeff Strohl Michele Melton 2011 Select Findings from What's It Worth? The Value of College Majors http://www9.georgetown.edu/grad/gppi/hpi/cew/pdfs/whatsitworth-select.pdf