Kevin Freiberg; Jackie Freiberg. (1998). Nuts!: Southwest Airlines' Crazy Recipe for Business and Personal Success (Reprint.). Crown Business.
Cita Chicago (17th ed.)Kevin Freiberg; Jackie Freiberg. Nuts!: Southwest Airlines' Crazy Recipe for Business and Personal Success. Reprint. Crown Business, 1998.
Cita MLA (9th ed.)Kevin Freiberg; Jackie Freiberg. Nuts!: Southwest Airlines' Crazy Recipe for Business and Personal Success. Reprint. Crown Business, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.