APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Goulder, Lawrence H., and Roberton C. Williams. The Usual Excess-burden Approximation Usually Doesn't Come Close. Cambridge, Mass, 1999.

MLA (9th ed.) Citation

Goulder, Lawrence H., and Roberton C. Williams. The Usual Excess-burden Approximation Usually Doesn't Come Close. 1999.