Παραπομπή σε μορφή APA (7η εκδ.)

Crew, M. A., & Kleindorfer, P. R. (2005). Regulatory and Economic Challenges in the Postal and Delivery Sector. Springer US. https://doi.org/10.1007/b102100

Παραπομπή σε μορφή Chicago (17η εκδ.)

Crew, Michael A., και Paul R. Kleindorfer. Regulatory and Economic Challenges in the Postal and Delivery Sector. Boston, MA: Springer US, 2005. https://doi.org/10.1007/b102100.

Παραπομπή σε μορφή MLA (9th εκδ.)

Crew, Michael A., και Paul R. Kleindorfer. Regulatory and Economic Challenges in the Postal and Delivery Sector. Springer US, 2005. https://doi.org/10.1007/b102100.