In tertium librum Sententiarum Petri Lombardi
MLA
Thomas, Aquinas, Saint, 1225?-1274. In tertium librum Sententiarum Petri Lombardi. s. XIII^^ex [end of the 13th century]. https://collections.library.yale.edu/catalog/2042294.
APA, 6th edition
Thomas, Aquinas, Saint, 1225?-1274. (s. XIII^^ex [end of the 13th century])[In tertium librum Sententiarum Petri Lombardi]. https://collections.library.yale.edu/catalog/2042294.