MLA

Dickens, Charles, 1812-1870, author. Master Humphrey's clock. 1840-1841.. https://collections.library.yale.edu/catalog/32242621.

APA, 6th edition

Dickens, Charles, 1812-1870, author. (1840-1841.)[Master Humphrey's clock]. https://collections.library.yale.edu/catalog/32242621.