Hersey, George L. (1993). High Renaissance art in St. Peter's and the Vatican: an interpretative guide. Chicago: University of Chicago Press. стр. 128. ISBN9780226327822.
Since Wright was not licensed as an architect in New York, he relied on Arthur Cort Holden, of the architectural firm Holden, McLaughlin & Associates, to deal with New York City's Board of Standards and Appeals. Dal Co, Francesco (2017). The Guggenheim: Frank Lloyd Wright's Iconoclastic Masterpiece. New Haven: Yale University Press. стр. 58. ISBN978-0300226058. OCLC969981835.