Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service), Baird, H. S., & Lopresti, D. P. (2005). Human Interactive Proofs: Second International Workshop, HIP 2005, Bethlehem, PA, USA, May 19-20, 2005. Proceedings. Springer Berlin Heidelberg.

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service), Henry S. Baird, και Daniel P. Lopresti. Human Interactive Proofs: Second International Workshop, HIP 2005, Bethlehem, PA, USA, May 19-20, 2005. Proceedings. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service), et al. Human Interactive Proofs: Second International Workshop, HIP 2005, Bethlehem, PA, USA, May 19-20, 2005. Proceedings. Springer Berlin Heidelberg, 2005.