MLA

Crane, Walter, 1845-1915, Hanfstaengl, Franz, 1804-1877 (firm). Europa. 1898. https://collections.library.yale.edu/catalog/2055562.

APA, 6th edition

Crane, Walter, 1845-1915, & Hanfstaengl, Franz, 1804-1877 (firm). (1898)[Europa]. https://collections.library.yale.edu/catalog/2055562.