Cita APA (7th ed.)
Perlitz, l. (2001). Airfares and ticketing. Pearson education.
Cita Chicago (17th ed.)
Perlitz, lee. Airfares and Ticketing. Australia: Pearson education, 2001.
Cita MLA (9th ed.)
Perlitz, lee. Airfares and Ticketing. Pearson education, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.