Não informado. (2018). Report of the Secretary of the Smithsonian Institution. Smithsonian Institution.
Chicago-Zitierstil (17. Ausg.)Não informado. Report of the Secretary of the Smithsonian Institution. Washington: Smithsonian Institution, 2018.
MLA-Zitierstil (8. Ausg.)Não informado. Report of the Secretary of the Smithsonian Institution. Smithsonian Institution, 2018.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.