MLA

Heath, William, 1795-1840, printmaker. Alas ther is no happiness on this side the grave!!! - Then come my love to tihs [sic] / [graphic]. [not before 1 February 1830]. https://collections.library.yale.edu/catalog/16704584.

APA, 6th edition

Heath, William, 1795-1840, printmaker. ([not before 1 February 1830])[Alas ther is no happiness on this side the grave!!! - Then come my love to tihs [sic] / [graphic]]. https://collections.library.yale.edu/catalog/16704584.