Cite

Map of Colorado territory, shewing the system of parks / drawn by Frederick J. Ebert.

MLA

Ebert, Frederick J. Map of Colorado Territory, Shewing the System of Parks / Drawn by Frederick J. Ebert. Jacob Monk, 1865. https://collections.library.yale.edu/catalog/15818406.

APA, 6th edition

Ebert, F. J. (1865). Map of Colorado territory, shewing the system of parks / drawn by Frederick J. Ebert. [Maps]. Jacob Monk, https://collections.library.yale.edu/catalog/15818406.