MLA

Portrait of Mr. Daniel Lambert ... [Graphic]. Printed and Published, August 1st, 1809, by W. and T. Darton, No.58 Holborn Hill, 0AD. https://collections.library.yale.edu/catalog/17338692.

APA, 6th edition

Portrait of Mr. Daniel Lambert ... [graphic]. (0 C.E.). [Portraits prints, Etchings]. Printed and Published, August 1st, 1809, by W. and T. Darton, No.58 Holborn Hill. https://collections.library.yale.edu/catalog/17338692.