Kevin Freiberg; Jackie Freiberg. (1998). Nuts!: Southwest Airlines' Crazy Recipe for Business and Personal Success (Reprint.). Crown Business.
Čikaški stil citiranja (17. izdanje)Kevin Freiberg; Jackie Freiberg. Nuts!: Southwest Airlines' Crazy Recipe for Business and Personal Success. Reprint. Crown Business, 1998.
MLA način citiranja (9. izdanje)Kevin Freiberg; Jackie Freiberg. Nuts!: Southwest Airlines' Crazy Recipe for Business and Personal Success. Reprint. Crown Business, 1998.
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