MLA

Dunkarton, Robert, b. 1744, Pether, Abraham, Reinagle, Philip, 1749-1833. The Night-blowing cereus. 1800 May 20. https://collections.library.yale.edu/catalog/2037412.

APA, 6th edition

Dunkarton, Robert, b. 1744, & Pether, Abraham, & Reinagle, Philip, 1749-1833. (1800 May 20)[The Night-blowing cereus]. https://collections.library.yale.edu/catalog/2037412.