Freiberg Kevin & Freiberg Jackie. (1996). Nuts!: Southwest Airlines' crazy recipe for business and personal success. Bard Press Publishing.
Chicago-viite (17. p.)Freiberg Kevin ja Freiberg Jackie. Nuts!: Southwest Airlines' Crazy Recipe for Business and Personal Success. Texas ,USA: Bard Press Publishing, 1996.
MLA-viite (9. p.)Freiberg Kevin ja Freiberg Jackie. Nuts!: Southwest Airlines' Crazy Recipe for Business and Personal Success. Bard Press Publishing, 1996.
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