Cita APA (7th ed.)

Grossman, G. M., & Helpman, E. (1999). Incomplete contracts and industrial organization. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Grossman, Gene M., i Elhanan Helpman. Incomplete Contracts and Industrial Organization. Cambridge: National Bureau of Economic Research, 1999.

Cita MLA (9th ed.)

Grossman, Gene M., i Elhanan Helpman. Incomplete Contracts and Industrial Organization. National Bureau of Economic Research, 1999.