APA

United States, . (2012). 2050: implications of demographic trends in the OSCE region : hearing before the Commission on Security and Cooperation in Europe, One Hundred Twelfth Congress, first session, June 20, 2011. Washington: U.S. Government Printing Office.

Chicago

United States, . 2012. 2050: implications of demographic trends in the OSCE region : hearing before the Commission on Security and Cooperation in Europe, One Hundred Twelfth Congress, first session, June 20, 2011. Washington: U.S. Government Printing Office.

Harvard

United States, . (2012). 2050: implications of demographic trends in the OSCE region : hearing before the Commission on Security and Cooperation in Europe, One Hundred Twelfth Congress, first session, June 20, 2011. Washington: U.S. Government Printing Office.

MLA

United States, . 2050: implications of demographic trends in the OSCE region : hearing before the Commission on Security and Cooperation in Europe, One Hundred Twelfth Congress, first session, June 20, 2011. Washington: U.S. Government Printing Office. 2012.