APA

Szymendera S., Sherlock M. F. & Library of Congress. (2018). The Black Lung Program, the Black Lung Disability Trust Fund, and the excise tax on coal: background and policy options. [Washington, D.C.]: Congressional Research Service.

Chicago

Szymendera Scott, Sherlock Molly F and Library of Congress. 2018. The Black Lung Program, the Black Lung Disability Trust Fund, and the excise tax on coal: background and policy options. [Washington, D.C.]: Congressional Research Service.

Harvard

Szymendera S., Sherlock M. F. and Library of Congress. (2018). The Black Lung Program, the Black Lung Disability Trust Fund, and the excise tax on coal: background and policy options. [Washington, D.C.]: Congressional Research Service.

MLA

Szymendera Scott, Sherlock Molly F and Library of Congress. The Black Lung Program, the Black Lung Disability Trust Fund, and the excise tax on coal: background and policy options. [Washington, D.C.]: Congressional Research Service. 2018.