APA-viite (7. p.)

Ashlock, D., & Lee, C. (2020). An introduction to proofs with set theory. Springer Nature.

Chicago-viite (17. p.)

Ashlock, Daniel, ja Colin Lee. An Introduction to Proofs with Set Theory. Switzerland: Springer Nature, 2020.

MLA-viite (9. p.)

Ashlock, Daniel, ja Colin Lee. An Introduction to Proofs with Set Theory. Springer Nature, 2020.