Lewis, M. A., & Lockheed, M. E. (2006). Inexcusable absence: Why 60 million girls still aren't in school and what to do about it. Center for Global Development.

Lewis, Maureen A., and Marlaine E. Lockheed. Inexcusable Absence: Why 60 Million Girls Still Aren't in School and What to Do About It. Washington, D.C.: Center for Global Development, 2006.

Lewis, Maureen A., and Marlaine E. Lockheed. Inexcusable Absence: Why 60 Million Girls Still Aren't in School and What to Do About It. Center for Global Development, 2006.