(en) Charles Henry Browning, Americans of Royal Descent: A Collection of Genealogies of American Families Whose Lineage is Traced to the Legimate Issue of Kings, Porter & Costes, (lire en ligne), p. 401–404
(en) Richard Jay Hutto, The Kaiser's Confidante: Mary Lee, the First American-Born Princess, McFarland, (ISBN9781476665726, lire en ligne), p. 41
Charles K. Hyde, The Dodge Brothers: The Men, the Motor Cars, and the Legacy, Wayne State University Press, (ISBN9780814337806, lire en ligne), p. 141
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(en) « Mr. Drexel's Bride; The Young Banker's Marriage to Miss Rita Armstrong. », The New York Times, , p. 4 (lire en ligne, consulté le )
(en) « Big Fortunes Are Shuffled By Many Weddings: Mr. and Mrs. Jean De St. Cyr in West; Queer Romance », Oakland Tribune, , p. 7 (lire en ligne, consulté le )
(en) « ANITA STEWART MARRIES PRINCE. – NOTED AUSTRIAN NOBLEMAN WED AT DINGWALL. », Los Angeles Herald, (lire en ligne, consulté le )
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(en) « School in Newport holds graduation ; Colonists Attend St. George Exercises as 29 Students Receive Their Diplomas. », The New York Times, (lire en ligne, consulté le )