MLA

Emmons, George F. (George Foster), 1811-1884. Journal kept while attached to the South Sea Surveying & Exploring Expedition on board of the U.S. Sloop of War Peacock. W. L. Hudson Esq. Commander.. Box 2. 1840 January - 1841 March. https://collections.library.yale.edu/catalog/10732815.

APA, 6th edition

Emmons, George F. (George Foster), 1811-1884. (["Box 2"])(1840 January - 1841 March)[Journal kept while attached to the South Sea Surveying & Exploring Expedition on board of the U.S. Sloop of War Peacock. W. L. Hudson Esq. Commander.]. https://collections.library.yale.edu/catalog/10732815.