MLA

Yale Law School, author, and issuing body. Yale Law School Bulletin 1919/20. Yale University, 1845. https://collections.library.yale.edu/catalog/17154445.

APA, 6th edition

Yale Law School, author, & issuing body. (1845). Yale Law School bulletin 1919/20 [Periodicals]. Yale University. https://collections.library.yale.edu/catalog/17154445.