MLA

My Lord Humpy Dandy!! as Perform'd by Mr. Grimaldi in the Pantomine of Harlequin Munchausen at the Theatre Royal Covent Garden. [Graphic]. Pubd. by J. Sidebethem, 281 Strand, 1819. https://collections.library.yale.edu/catalog/10968847.

APA, 6th edition

My Lord Humpy Dandy!! as perform'd by Mr. Grimaldi in the pantomine of Harlequin Munchausen at the Theatre Royal Covent Garden. [graphic]. (1819). [Satires (Visual works) England 1819, Etchings England London 1819, Watermarks (Paper)]. Pubd. by J. Sidebethem, 281 Strand. https://collections.library.yale.edu/catalog/10968847.