Cite

The National Geographic magazine map of the new Balkan states and Central Europe / prepared by J.G. Bartholomew ; Gilert H. Grosvenor, Editor.

MLA

Edinburgh Geographical Institute, National Geographic Society (U.S.). Cartographic Division. The National Geographic magazine map of the new Balkan states and Central Europe / prepared by J.G. Bartholomew ; Gilert H. Grosvenor, Editor.. BRBL_00034. 1914. https://collections.library.yale.edu/catalog/15258934.

APA, 6th edition

Edinburgh Geographical Institute, & National Geographic Society (U.S.). Cartographic Division. (["BRBL_00034"])(1914)[The National Geographic magazine map of the new Balkan states and Central Europe / prepared by J.G. Bartholomew ; Gilert H. Grosvenor, Editor.]. https://collections.library.yale.edu/catalog/15258934.