APA

United States, . (2019). Perspectives on protecting the electric grid from an electromagnetic pulse or geomagnetic disturbance: roundtable before the Committee on Homeland Security and Governmental Affairs, United States Senate, One Hundred Sixteenth Congress, first session, February 27, 2019. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2019. Perspectives on protecting the electric grid from an electromagnetic pulse or geomagnetic disturbance: roundtable before the Committee on Homeland Security and Governmental Affairs, United States Senate, One Hundred Sixteenth Congress, first session, February 27, 2019. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2019). Perspectives on protecting the electric grid from an electromagnetic pulse or geomagnetic disturbance: roundtable before the Committee on Homeland Security and Governmental Affairs, United States Senate, One Hundred Sixteenth Congress, first session, February 27, 2019. Washington: U.S. Government Publishing Office.

MLA

United States, . Perspectives on protecting the electric grid from an electromagnetic pulse or geomagnetic disturbance: roundtable before the Committee on Homeland Security and Governmental Affairs, United States Senate, One Hundred Sixteenth Congress, first session, February 27, 2019. Washington: U.S. Government Publishing Office. 2019.