Cato: A Tragedy in Five Acts by Joseph Addison, pages 42 and 43.
MLA
Addison, Joseph. Cato: A Tragedy in Five Acts by Joseph Addison, Pages 42 and 43. 0AD. https://collections.library.yale.edu/catalog/10015990.
APA, 6th edition
Addison, J. (0 C.E.). Cato: A Tragedy in Five Acts by Joseph Addison, pages 42 and 43. [Books (part of)]. https://collections.library.yale.edu/catalog/10015990.