APA-Zitierstil (7. Ausg.)

Não informado. (2021). LC Classification, Additions and Changes. Library of Congress.

Chicago-Zitierstil (17. Ausg.)

Não informado. LC Classification, Additions and Changes. Washington: Library of Congress, 2021.

MLA-Zitierstil (8. Ausg.)

Não informado. LC Classification, Additions and Changes. Library of Congress, 2021.

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.