APA-viite (7. p.)

Klein, M., & Harford, T. (2005). The market for aid. International Finance Corporation.

Chicago-viite (17. p.)

Klein, Michael, ja Tim Harford. The Market for Aid. Washington, D.C.: International Finance Corporation, 2005.

MLA-viite (8. p.)

Klein, Michael, ja Tim Harford. The Market for Aid. International Finance Corporation, 2005.