MLA

Longmans, Green, and Co. Austria-Hungary. Longmans & Co., 0AD. https://collections.library.yale.edu/catalog/15238077.

APA, 6th edition

Longmans, G., & C. (0 C.E.). Austria-Hungary. [Maps]. Longmans & Co., https://collections.library.yale.edu/catalog/15238077.