APA

United States, . (2019). Understanding the digital advertising ecosystem: hearing before the Subcommittee on Digital Commerce and Consumer Protection of the Committee on Energy and Commerce, House of Representatives, One Hundred Fifteenth Congress, second session, June 14, 2018. Washington: U.S. Government Publishing Office.

Chicago

United States, . 2019. Understanding the digital advertising ecosystem: hearing before the Subcommittee on Digital Commerce and Consumer Protection of the Committee on Energy and Commerce, House of Representatives, One Hundred Fifteenth Congress, second session, June 14, 2018. Washington: U.S. Government Publishing Office.

Harvard

United States, . (2019). Understanding the digital advertising ecosystem: hearing before the Subcommittee on Digital Commerce and Consumer Protection of the Committee on Energy and Commerce, House of Representatives, One Hundred Fifteenth Congress, second session, June 14, 2018. Washington: U.S. Government Publishing Office.

MLA

United States, . Understanding the digital advertising ecosystem: hearing before the Subcommittee on Digital Commerce and Consumer Protection of the Committee on Energy and Commerce, House of Representatives, One Hundred Fifteenth Congress, second session, June 14, 2018. Washington: U.S. Government Publishing Office. 2019.