"Mr. Edward Harriman..."(PDF). The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 79, no. 2038. April 6, 1907. p. 296 – via columbia.edu.
"Newest Great Hotel". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 80, no. 2061. September 14, 1907. p. 398 – via columbia.edu.
"Out Among the Builders". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 30, no. 771. December 23, 1882. p. 140 – via columbia.edu.
"Out Among the Builders". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 32, no. 813. October 13, 1883. p. 785 – via columbia.edu.
"The Hotels of Manhattan". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 75, no. 1945. June 24, 1905. p. 1367 – via columbia.edu.
Sutton, Larry; Michelini, Alex (March 16, 1995). "Looking to Trump two on Plaza deal". New York Daily News. p. 1272. Retrieved November 26, 2020 – via newspapers.com.
"Hotel Plaza Plans New Cocktail Room: Corner at 5th Av. And 58th St. Will Be Fitted Up at Cost of $50,000". The New York Times. January 31, 1934. p. 34. ISSN0362-4331. ProQuest101079852.
"Atlas Interests Buy Plaza Hotel In Security Deal: Large 5th Avenue Property Sold by General Realty to Floyd B. Odlum Group". New York Herald Tribune. October 8, 1943. p. 29. ProQuest1268022005.
"Hotel Corporation of America Buys 2 Hotels for $14,930,000". Daily Boston Globe. March 1, 1956. p. 15. ProQuest842256840.
"The Grand Hotel: Aging but Still Elegant, Gotham's Storied Plaza Prospers on Nostalgia Edwardian Opulence, Service Enchant Jet-Age Patrons". The Wall Street Journal. August 23, 1965. p. 1. ISSN0099-9660. ProQuest132999458.
"Hotel America To Change Name Nov. 10 to Sonesta". Hartford Courant. October 23, 1969. p. 64. ProQuest550282274.
Meyer, Priscilla S. (April 2, 1974). "Sonesta's Plaza Hotel Is Sought by Partners In New York Concern: Wellington Associates, Which Tried Sonesta Take-Over in '73, Is Discussing Purchase". The Wall Street Journal. p. 16. ISSN0099-9660. ProQuest133919074.
Revson, James A. (September 21, 1989). "Donald and Ivana Glitz the Plaza". Newsday. p. 04. ProQuest1943384125.
Agovino, Theresa (January 29, 1990). "Profit in Sight for a Rejuvenated Plaza". Crain's New York Business. Vol. 6, no. 5. p. 1. ProQuest219134786.
"Trump Relinquishing Half of Plaza Hotel Sale of Suites as Condos Fails to Raise Cash". Sun Sentinel. Reuters. March 19, 1992. p. 2D. ProQuest388941901.
Reynolds 1994, p. 230. Reynolds, Donald (1994). The Architecture of New York City: Histories and Views of Important Structures, Sites, and Symbols. New York: J. Wiley. ISBN978-0-471-01439-3. OCLC45730295.
Reynolds 1994, p. 231. Reynolds, Donald (1994). The Architecture of New York City: Histories and Views of Important Structures, Sites, and Symbols. New York: J. Wiley. ISBN978-0-471-01439-3. OCLC45730295.
Reynolds 1994, p. 232. Reynolds, Donald (1994). The Architecture of New York City: Histories and Views of Important Structures, Sites, and Symbols. New York: J. Wiley. ISBN978-0-471-01439-3. OCLC45730295.
"Hotel Plaza Plans New Cocktail Room: Corner at 5th Av. And 58th St. Will Be Fitted Up at Cost of $50,000". The New York Times. January 31, 1934. p. 34. ISSN0362-4331. ProQuest101079852.
"The Grand Hotel: Aging but Still Elegant, Gotham's Storied Plaza Prospers on Nostalgia Edwardian Opulence, Service Enchant Jet-Age Patrons". The Wall Street Journal. August 23, 1965. p. 1. ISSN0099-9660. ProQuest132999458.
Meyer, Priscilla S. (April 2, 1974). "Sonesta's Plaza Hotel Is Sought by Partners In New York Concern: Wellington Associates, Which Tried Sonesta Take-Over in '73, Is Discussing Purchase". The Wall Street Journal. p. 16. ISSN0099-9660. ProQuest133919074.