By Levitt, Steven D., Dubner, Stephen J., Stephen J. Dubner, Steven D. Levitt
By Steven D. Levitt, Stephen J. Dubner
By Dubner, Stephen J., Levitt, Steven D., Stephen J. Dubner, Steven D. Levitt
By Steven D. Levitt and Stephen J. Dubner, Stephen J. Dubner, Steven D. Levitt