Não informado. (2020). Reports of the Secretary and Treasurer. John Simon Guggenheim Memorial Foundation.
Chicago-Zitierstil (17. Ausg.)Não informado. Reports of the Secretary and Treasurer. New York: John Simon Guggenheim Memorial Foundation, 2020.
MLA-Zitierstil (8. Ausg.)Não informado. Reports of the Secretary and Treasurer. John Simon Guggenheim Memorial Foundation, 2020.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.