The theory and practice of communism in 1971.
Hearings, Ninety-second Congress, first session.

APA Citation

United States. Congress. House. Committee on Internal Security. (1971). The theory and practice of communism in 1971: Hearings, Ninety-second Congress, first session. Washington: U.S. Govt. Print. Off..

MLA Citation

United States. Congress. House. Committee on Internal Security. The Theory And Practice of Communism In 1971: Hearings, Ninety-second Congress, First Session. Washington: U.S. Govt. Print. Off., 1971.

Warning: These citations may not always be complete (especially for serials).