Cite

Block diagram showing terrain of the Balkan Peninsula.

MLA

Block Diagram Showing Terrain of the Balkan Peninsula. American Geographical Society, 1918. https://collections.library.yale.edu/catalog/15827158.

APA, 6th edition

Block diagram showing terrain of the Balkan Peninsula. (1918). [Maps]. American Geographical Society, https://collections.library.yale.edu/catalog/15827158.