Cita APA (7th ed.)

Gilchrist, S., & Williams, J. C. (1998). Putty-clay and investment / Simon Gilschrist, John C. Williams. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Gilchrist, Simon, i John C. Williams. Putty-clay and Investment / Simon Gilschrist, John C. Williams. Cambridge: National Bureau of Economic Research, 1998.

Cita MLA (9th ed.)

Gilchrist, Simon, i John C. Williams. Putty-clay and Investment / Simon Gilschrist, John C. Williams. National Bureau of Economic Research, 1998.