20-251 - 20-288, 21-1 - 21-50
MLA
Clark, Hall, and Peck and White Brothers (New Haven, Conn.). 20-251 - 20-288, 21-1 - 21-50. Box 1092. 1890s-1982. https://collections.library.yale.edu/catalog/10014779.
APA, 6th edition
Clark, Hall, and Peck and White Brothers (New Haven, Conn.). (["Box 1092"])(1890s-1982)[20-251 - 20-288, 21-1 - 21-50]. https://collections.library.yale.edu/catalog/10014779.