Cite

[Planmaterial der 7. Armee. 22. Montcornet.]

MLA

[Planmaterial Der 7. Armee. 22. Montcornet.]. s.n., 1918. https://collections.library.yale.edu/catalog/15237975.

APA, 6th edition

[Planmaterial der 7. Armee. 22. Montcornet.]. (1918). [Maps]. s.n., https://collections.library.yale.edu/catalog/15237975.