MLA

Columbia University. Geographical Press, Lobeck, A. K. (Armin Kohl), 1886-1958. Physiographic diagram of Europe / by A.K. Lobeck.. BRBL_00037A. c1923, repr. 1944.. https://collections.library.yale.edu/catalog/15259163.

APA, 6th edition

Columbia University. Geographical Press, & Lobeck, A. K. (Armin Kohl), 1886-1958. (["BRBL_00037A"])(c1923, repr. 1944.)[Physiographic diagram of Europe / by A.K. Lobeck.]. https://collections.library.yale.edu/catalog/15259163.