New York City Ballet production of "Kammermusik No. 2", with Colleen Neary and Karin von Aroldingen, choreography by George Balanchine (New York)

Billy Rose Theatre Division, The New York Public Library. "New York City Ballet production of "Kammermusik No. 2", with Colleen Neary and Karin von Aroldingen, choreography by George Balanchine (New York)" The New York Public Library Digital Collections. 1978. https://digitalcollections.nypl.org/items/00e452d0-c2ba-0137-7ac0-11d7615b4167

Billy Rose Theatre Division, The New York Public Library. (1978). New York City Ballet production of "Kammermusik No. 2", with Colleen Neary and Karin von Aroldingen, choreography by George Balanchine (New York) Retrieved from https://digitalcollections.nypl.org/items/00e452d0-c2ba-0137-7ac0-11d7615b4167

Billy Rose Theatre Division, The New York Public Library. "New York City Ballet production of "Kammermusik No. 2", with Colleen Neary and Karin von Aroldingen, choreography by George Balanchine (New York)" New York Public Library Digital Collections. Accessed November 7, 2025. https://digitalcollections.nypl.org/items/00e452d0-c2ba-0137-7ac0-11d7615b4167

<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/00e452d0-c2ba-0137-7ac0-11d7615b4167 | title= (still image; still image) New York City Ballet production of "Kammermusik No. 2", with Colleen Neary and Karin von Aroldingen, choreography by George Balanchine (New York) (1978) | author=Digital Collections, The New York Public Library | accessdate=November 7, 2025 | publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>