Hall, Edward Hagaman (1915). "Appendix H– Seal and Flag of the City of New York". Twentieth Annual Report of the American Scenic and Historic Preservation Society to the Legislature of the State of New York. Albany: J. B. Lyon Company, Printers. p. 819.
Editors of Encyclopædia Britannica. "Paul Manship". Encyclopædia Britannica. Encyclopædia Britannica, Inc. {{cite web}}: |last= has generic name (help)
