Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service), Hetland, J., & Gochitashvili, T. (2004). Security of Natural Gas Supply through Transit Countries. Springer Netherlands.

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service), Jens Hetland, και Teimuraz Gochitashvili. Security of Natural Gas Supply Through Transit Countries. Dordrecht: Springer Netherlands, 2004.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service), et al. Security of Natural Gas Supply Through Transit Countries. Springer Netherlands, 2004.