A map of Delaware and eastern shore of Maryland with the soundings of the Bay of Delaware from actual survey & soundings made in 1799, 1800 & 1801 by the Author.
MLA
A Map of Delaware and Eastern Shore of Maryland with the Soundings of the Bay of Delaware from Actual Survey & Soundings Made in 1799, 1800 & 1801 by the Author. 0AD. https://collections.library.yale.edu/catalog/15811169.
APA, 6th edition
A map of Delaware and eastern shore of Maryland with the soundings of the Bay of Delaware from actual survey & soundings made in 1799, 1800 & 1801 by the Author. (0 C.E.). [Maps]. https://collections.library.yale.edu/catalog/15811169.