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 1. 1838 August - 1839 December. https://collections.library.yale.edu/catalog/10732814.

APA, 6th edition

Emmons, George F. (George Foster), 1811-1884. (["Box 1"])(1838 August - 1839 December)[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/10732814.