Gaya APA

Davidoff, P, G., Davidoff, D, C. (1992). Air Fares and TIcketing . New Jersey: Prentice-Hall.

Gaya MLA

Davidoff, Philip, G.., Davidoff, Doris, C.. "Air Fares and TIcketing". New Jersey: Prentice-Hall, 1992. BUKU.