Παραπομπή σε μορφή APA (7η εκδ.)

ebrary, Inc, Gullberg, A., & Isaksson, K. (2009). Congestion taxes in city traffic: Lessons learnt from the Stockholm trial. Nordic Academic Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

ebrary, Inc, Anders Gullberg, και Karolina Isaksson. Congestion Taxes in City Traffic: Lessons Learnt from the Stockholm Trial. Lund: Nordic Academic Press, 2009.

Παραπομπή σε μορφή MLA (9th εκδ.)

ebrary, Inc, et al. Congestion Taxes in City Traffic: Lessons Learnt from the Stockholm Trial. Nordic Academic Press, 2009.