Gittings, Barbara and Kay Tobin
MLA
Giard, Robert. Gittings, Barbara and Kay Tobin. 1991. https://collections.library.yale.edu/catalog/2032866.
APA, 6th edition
Giard, R. (1991). Gittings, Barbara and Kay Tobin. https://collections.library.yale.edu/catalog/2032866.