Thilly, F. (1905). Introduction to ethics. Charles Scribner's Sons.
Cita Chicago (17th ed.)Thilly, Frank. Introduction to Ethics. New York: Charles Scribner's Sons, 1905.
Cita MLA (9th ed.)Thilly, Frank. Introduction to Ethics. Charles Scribner's Sons, 1905.
Atenció: Aquestes cites poden no estar 100% correctes.