Cite

Monumental guide to the Gettyburg Battlefield.

MLA

Monumental Guide to the Gettyburg Battlefield. Schuyler A. Hammond & Edgar W. Hewitt , 1899. https://collections.library.yale.edu/catalog/15811161.

APA, 6th edition

Monumental guide to the Gettyburg Battlefield. (1899). [Maps]. Schuyler A. Hammond & Edgar W. Hewitt , https://collections.library.yale.edu/catalog/15811161.