MLA

Co, Rand Avery Supply. Map of Eastern Steamship Co. Showing Approaches to Mount Desert [Cartographic Material]. Rand Avery Supply Co., 0AD. https://collections.library.yale.edu/catalog/15952243.

APA, 6th edition

Co, R. A. S. (0 C.E.). Map of Eastern Steamship Co. showing approaches to Mount Desert [cartographic material]. [Maps]. Rand Avery Supply Co., https://collections.library.yale.edu/catalog/15952243.