Cite

Map of Ontario County, New York : from actual surveys / by S.N. Beers, assisted by D.G. Beers.

MLA

Beers, S. N. Map of Ontario County, New York : from Actual Surveys / by S.N. Beers, Assisted by D.G. Beers. A.R.Z. Dawson, 1859. https://collections.library.yale.edu/catalog/15827406.

APA, 6th edition

Beers, S. N. (1859). Map of Ontario County, New York : from actual surveys / by S.N. Beers, assisted by D.G. Beers. [Maps]. A.R.Z. Dawson, https://collections.library.yale.edu/catalog/15827406.