MLA

Collins, Wilkie, 1824-1889. The Morwick Farm mystery : a novel. August 7, 1886.. https://collections.library.yale.edu/catalog/32578114.

APA, 6th edition

Collins, Wilkie, 1824-1889. (August 7, 1886.)[The Morwick Farm mystery : a novel]. https://collections.library.yale.edu/catalog/32578114.