Cite

The agreeable surprise [Flute I, violin II parts]

MLA

Shield, William, 1748-1829. The agreeable surprise [Flute I, violin II parts]. Folder 1. [circa 1781-1792]. https://collections.library.yale.edu/catalog/2064640.

APA, 6th edition

Shield, William, 1748-1829. (["Folder 1"])([circa 1781-1792])[The agreeable surprise [Flute I, violin II parts]]. https://collections.library.yale.edu/catalog/2064640.