Cita APA (7th ed.)

Ehlers. Logic by Way of Set Theory. Holt, Rinehart and Winston.

Cita Chicago (17th ed.)

Ehlers. Logic by Way of Set Theory. London / Delhi / New York: Holt, Rinehart and Winston.

Cita MLA (9th ed.)

Ehlers. Logic by Way of Set Theory. Holt, Rinehart and Winston.