Não informado. The President's review and annual report. Rockefeller Foundation.
Chicago-viite (17. p.)Não informado. The President's Review and Annual Report. New York: Rockefeller Foundation.
MLA-viite (8. p.)Não informado. The President's Review and Annual Report. Rockefeller Foundation.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.