MLA

Wells, James Lesesne, 1902-1993. The Smith-Mason Gallery of Art presents painting and prints of James Lesesne Wells : retrospective 1949 to 1969 : showing from April 6 through May 6, 1969 .... [1969]. https://collections.library.yale.edu/catalog/17366989.

APA, 6th edition

Wells, James Lesesne, 1902-1993. ([1969])[The Smith-Mason Gallery of Art presents painting and prints of James Lesesne Wells : retrospective 1949 to 1969 : showing from April 6 through May 6, 1969 ...]. https://collections.library.yale.edu/catalog/17366989.