APA

Stupak J. M., Keightley M. P. & Library of Congress. (2019). Introduction to U.S. economy: GDP and economic growth. [Washington, D.C.]: Congressional Research Service.

Chicago

Stupak Jeffrey M, Keightley Mark P and Library of Congress. 2019. Introduction to U.S. economy: GDP and economic growth. [Washington, D.C.]: Congressional Research Service.

Harvard

Stupak J. M., Keightley M. P. and Library of Congress. (2019). Introduction to U.S. economy: GDP and economic growth. [Washington, D.C.]: Congressional Research Service.

MLA

Stupak Jeffrey M, Keightley Mark P and Library of Congress. Introduction to U.S. economy: GDP and economic growth. [Washington, D.C.]: Congressional Research Service. 2019.