Cite

[5 historical maps of Spain] / gez. v. F.A. Ukert.

MLA

Ukert, F. A. (Friedrich August), 1780-1851. [5 historical maps of Spain] / gez. v. F.A. Ukert.. BRBL_00192. 1820?]. https://collections.library.yale.edu/catalog/15487325.

APA, 6th edition

Ukert, F. A. (Friedrich August), 1780-1851. (["BRBL_00192"])(1820?])[[5 historical maps of Spain] / gez. v. F.A. Ukert.]. https://collections.library.yale.edu/catalog/15487325.