Cita APA (7th ed.)

Lippmann, W. (1929). A preface to morals. The Macmillan company.

Cita Chicago (17th ed.)

Lippmann, Walter. A Preface to Morals. New York: The Macmillan company, 1929.

Cita MLA (8th ed.)

Lippmann, Walter. A Preface to Morals. The Macmillan company, 1929.