Παραπομπή σε μορφή APA (7η εκδ.)

Williams, G. (2002). Airline competition =: Deregulation's mixed legacy. Ashgate.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Williams, George. Airline Competition =: Deregulation's Mixed Legacy. Aldershot, Hants, England : Bulrlington, VT, USA: Ashgate, 2002.

Παραπομπή σε μορφή MLA (9th εκδ.)

Williams, George. Airline Competition =: Deregulation's Mixed Legacy. Ashgate, 2002.