MLA

Ellis, Clement, 1630-1700. A catechism : wherein the learner is at once taught to rehearse and prove all the main points of Christian religion, by answering to every question in the very words of Holy Scripture : together with a short and plain discourse, useful to confirm the weak. 1674. https://collections.library.yale.edu/catalog/2057304.

APA, 6th edition

Ellis, Clement, 1630-1700. (1674)[A catechism : wherein the learner is at once taught to rehearse and prove all the main points of Christian religion, by answering to every question in the very words of Holy Scripture : together with a short and plain discourse, useful to confirm the weak]. https://collections.library.yale.edu/catalog/2057304.