Παραπομπή σε μορφή APA (7η εκδ.)

Card, D., & Robins, P. K. (1996). Do financial incentives encourage welfare recipients to workn: Evidence from a randomnized evaluation of the self-sufficiency project. National Bureau of Economic Research.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Card, David, και Phillip K. Robins. Do Financial Incentives Encourage Welfare Recipients to Workn: Evidence from a Randomnized Evaluation of the Self-sufficiency Project. Cambridge: National Bureau of Economic Research, 1996.

Παραπομπή σε μορφή MLA (9th εκδ.)

Card, David, και Phillip K. Robins. Do Financial Incentives Encourage Welfare Recipients to Workn: Evidence from a Randomnized Evaluation of the Self-sufficiency Project. National Bureau of Economic Research, 1996.