MLA

Loveday, Robert, fl. 1655. Loveday's letters domestick and foreign : to several persons, occasionally distributed in subjects philosophical, historical, and moral. 1676.. https://collections.library.yale.edu/catalog/2066164.

APA, 6th edition

Loveday, Robert, fl. 1655. (1676.)[Loveday's letters domestick and foreign : to several persons, occasionally distributed in subjects philosophical, historical, and moral]. https://collections.library.yale.edu/catalog/2066164.