MLA

Cole, Bob, 1868-1911, Johnson, J. Rosamond (John Rosamond), 1873-1954. Sweetest gal in town / by Cole and Johnson. [c1908]. https://collections.library.yale.edu/catalog/2109629.

APA, 6th edition

Cole, Bob, 1868-1911, & Johnson, J. Rosamond (John Rosamond), 1873-1954. ([c1908])[Sweetest gal in town / by Cole and Johnson]. https://collections.library.yale.edu/catalog/2109629.