Cite

[Commonplace books], [late 18th/early 19th century].

MLA

[Commonplace Books], [Late 18th/Early 19th Century]. 0AD. https://collections.library.yale.edu/catalog/31910779.

APA, 6th edition

[Commonplace books], [late 18th/early 19th century]. (0 C.E.). https://collections.library.yale.edu/catalog/31910779.