APA

Parfomak P. W., Library of Congress, . (2018). Vulnerability of concentrated critical infrastructure: background and policy options. [Washington, D.C.]: Congressional Research Service.

Chicago

Parfomak Paul W, Library of Congress, . 2018. Vulnerability of concentrated critical infrastructure: background and policy options. [Washington, D.C.]: Congressional Research Service.

Harvard

Parfomak P. W., Library of Congress, . (2018). Vulnerability of concentrated critical infrastructure: background and policy options. [Washington, D.C.]: Congressional Research Service.

MLA

Parfomak Paul W, Library of Congress, . Vulnerability of concentrated critical infrastructure: background and policy options. [Washington, D.C.]: Congressional Research Service. 2018.