"Iolani Palace". National Historic Landmark summary listing. National Park Service. Archived from the original on 2009-08-28. Retrieved 2008-06-21.
pdfhost.focus.nps.gov
Ben Levy (December 1985). "Iolani palace nomination form"(PDF). National Register of Historic Places. U.S. National Park Service. Archived from the original(PDF) on 2012-10-08. Retrieved 2010-04-06.
"Iolani Palace". National Historic Landmark summary listing. National Park Service. Archived from the original on 2009-08-28. Retrieved 2008-06-21.
Ben Levy (December 1985). "Iolani palace nomination form"(PDF). National Register of Historic Places. U.S. National Park Service. Archived from the original(PDF) on 2012-10-08. Retrieved 2010-04-06.