Gaya APA

Daviddoff, P, G., Daviddoff, D, S. (1995). Air Fares Ticketing (Third Edition). USA: Prentice Hall.

Gaya MLA

Daviddoff, Philip, G.., Daviddoff, Doris, S.. "Air Fares Ticketing". Third Edition USA: Prentice Hall, 1995. Text.