Cite

[Switzerland] / G.H. Dufour direxit; H. Müllhaupt sculpsit.

MLA

[Switzerland] / G.H. Dufour Direxit; H. Müllhaupt Sculpsit. Swiss Government], 1864. https://collections.library.yale.edu/catalog/15483200.

APA, 6th edition

[Switzerland] / G.H. Dufour direxit; H. Müllhaupt sculpsit. (1864). [Topographic maps]. Swiss Government], https://collections.library.yale.edu/catalog/15483200.