Style de citation APA (7e éd.)

United States. Library of Congress. (1990). Library of Congress classification schedules combined with additions and changes through 1989: Class D subclass DJK-DK History of Eastern Europe. (General), Soviet Union, Poland. Gale Research.

Style de citation Chicago (17e éd.)

United States. Library of Congress. Library of Congress Classification Schedules Combined with Additions and Changes Through 1989: Class D Subclass DJK-DK History of Eastern Europe. (General), Soviet Union, Poland. Detroit: Gale Research, 1990.

Style de citation MLA (9e éd.)

United States. Library of Congress. Library of Congress Classification Schedules Combined with Additions and Changes Through 1989: Class D Subclass DJK-DK History of Eastern Europe. (General), Soviet Union, Poland. Gale Research, 1990.