APA način citiranja (7. izdanje)

Goulder, L. H., & Williams, R. C. (1999). The usual excess-burden approximation usually doesn't come close. National Bureau of Economic Research.

Čikaški stil citiranja (17. izdanje)

Goulder, Lawrence H., i Roberton C. Williams. The Usual Excess-burden Approximation Usually Doesn't Come Close. Cambridge: National Bureau of Economic Research, 1999.

MLA način citiranja (9. izdanje)

Goulder, Lawrence H., i Roberton C. Williams. The Usual Excess-burden Approximation Usually Doesn't Come Close. National Bureau of Economic Research, 1999.