Παραπομπή σε μορφή APA (7η εκδ.)

Hedman, S. (2004). A first course in logic: An introduction to model theory, proof theory, computability and complexity. Oxford University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hedman, Shawn. A First Course in Logic: An Introduction to Model Theory, Proof Theory, Computability and Complexity. New York: Oxford University Press, 2004.

Παραπομπή σε μορφή MLA (8th εκδ.)

Hedman, Shawn. A First Course in Logic: An Introduction to Model Theory, Proof Theory, Computability and Complexity. Oxford University Press, 2004.