MLA

Haldeman-Julius, E. (Emanuel), 1888-1951, Shaw, Bernard, 1856-1950. Little blue book. Undated. https://collections.library.yale.edu/catalog/10800583.

APA, 6th edition

Haldeman-Julius, E. (Emanuel), 1888-1951, & Shaw, Bernard, 1856-1950. (Undated)[Little blue book]. https://collections.library.yale.edu/catalog/10800583.