Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service), Zerefos, C., Contopoulos, G., & Skalkeas, G. (2009). Twenty Years of Ozone Decline: Proceedings of the Symposium for the 20th Anniversary of the Montreal Protocol. Springer Netherlands.

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service), Christos Zerefos, Georgios Contopoulos, και Gregory Skalkeas. Twenty Years of Ozone Decline: Proceedings of the Symposium for the 20th Anniversary of the Montreal Protocol. Dordrecht: Springer Netherlands, 2009.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service), et al. Twenty Years of Ozone Decline: Proceedings of the Symposium for the 20th Anniversary of the Montreal Protocol. Springer Netherlands, 2009.