Clap, T. (1765). An essay on the nature and foundation of moral virtue and obligation: Being a short introduction to the study of ethics; for the use of the students of Yale-college. Printed by B. Mecom.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Clap, Thomas. An Essay on the Nature and Foundation of Moral Virtue and Obligation: Being a Short Introduction to the Study of Ethics; for the Use of the Students of Yale-college. New-Haven: Printed by B. Mecom, 1765.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Clap, Thomas. An Essay on the Nature and Foundation of Moral Virtue and Obligation: Being a Short Introduction to the Study of Ethics; for the Use of the Students of Yale-college. Printed by B. Mecom, 1765.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.