Cite

A chart of the Gulf of St. Laurence [cartographic material] : composed from a great number of actual surveys and other materials, regulated and connected by astronomical observations.

MLA

Jefferys, Thomas, -1771. A chart of the Gulf of St. Laurence [cartographic material] : composed from a great number of actual surveys and other materials, regulated and connected by astronomical observations.. BRBL_00689. 25th March, 1775.. https://collections.library.yale.edu/catalog/15825311.

APA, 6th edition

Jefferys, Thomas, -1771. (["BRBL_00689"])(25th March, 1775.)[A chart of the Gulf of St. Laurence [cartographic material] : composed from a great number of actual surveys and other materials, regulated and connected by astronomical observations.]. https://collections.library.yale.edu/catalog/15825311.