George Balanchine, Jacques d'Amboise and Melissa Hayden rehearse the Pas de Deux, in a New York City Ballet production of "The Nutcracker."

Billy Rose Theatre Division, The New York Public Library. "George Balanchine, Jacques d'Amboise and Melissa Hayden rehearse the Pas de Deux, in a New York City Ballet production of "The Nutcracker."" The New York Public Library Digital Collections. 1964. https://digitalcollections.nypl.org/items/eb2ff1f0-a091-0131-2b50-58d385a7b928

Billy Rose Theatre Division, The New York Public Library. (1964). George Balanchine, Jacques d'Amboise and Melissa Hayden rehearse the Pas de Deux, in a New York City Ballet production of "The Nutcracker." Retrieved from https://digitalcollections.nypl.org/items/eb2ff1f0-a091-0131-2b50-58d385a7b928

Billy Rose Theatre Division, The New York Public Library. "George Balanchine, Jacques d'Amboise and Melissa Hayden rehearse the Pas de Deux, in a New York City Ballet production of "The Nutcracker."" New York Public Library Digital Collections. Accessed November 7, 2025. https://digitalcollections.nypl.org/items/eb2ff1f0-a091-0131-2b50-58d385a7b928

<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/eb2ff1f0-a091-0131-2b50-58d385a7b928 | title= (still image; still image) George Balanchine, Jacques d'Amboise and Melissa Hayden rehearse the Pas de Deux, in a New York City Ballet production of "The Nutcracker." (1964) | author=Digital Collections, The New York Public Library | accessdate=November 7, 2025 | publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>