MLA

Byfield, Nicholas, 1579-1622. The signes, or, An essay concerning the assurance of Gods love and mans salvation : gathered out of the Holy Scriptures / gathered out of the Holy Scriptures by Nicholas Byfield .... 1637. https://collections.library.yale.edu/catalog/2007899.

APA, 6th edition

Byfield, Nicholas, 1579-1622. (1637)[The signes, or, An essay concerning the assurance of Gods love and mans salvation : gathered out of the Holy Scriptures / gathered out of the Holy Scriptures by Nicholas Byfield ...]. https://collections.library.yale.edu/catalog/2007899.