Cite

B No.2 Sketch of Buttermilk Channel New York Harbor by the Hydrographic party of the Coast Survey ...

MLA

B No.2 Sketch of Buttermilk Channel New York Harbor by the Hydrographic Party of the Coast Survey ... Coast Survey, 1849. https://collections.library.yale.edu/catalog/15763438.

APA, 6th edition

B No.2 Sketch of Buttermilk Channel New York Harbor by the Hydrographic party of the Coast Survey ... (1849). [Maps]. Coast Survey, https://collections.library.yale.edu/catalog/15763438.