Cita APA (7th ed.)

Lambert, K., & Ulrich, W. (1980). The nature of argument. Macmillan.

Cita Chicago (17th ed.)

Lambert, Karel, i William Ulrich. The Nature of Argument. New York: Macmillan, 1980.

Cita MLA (9th ed.)

Lambert, Karel, i William Ulrich. The Nature of Argument. Macmillan, 1980.