MLA

Explanation of the Island of Elba and Porto-Ferrajo, Taken on the Spot by Henry Aston Barker ... 1815. https://collections.library.yale.edu/catalog/2111206.

APA, 6th edition

Explanation of the Island of Elba and Porto-Ferrajo, taken on the spot by Henry Aston Barker ... (1815). [Frontispieces (Illustrations), Panoramas, Prints (Visual works)]. https://collections.library.yale.edu/catalog/2111206.