Freiberg Kevin & Freiberg Jackie. (1996). Nuts!: Southwest Airlines' crazy recipe for business and personal success. Bard Press Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFreiberg Kevin और Freiberg Jackie. Nuts!: Southwest Airlines' Crazy Recipe for Business and Personal Success. Texas ,USA: Bard Press Publishing, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFreiberg Kevin और Freiberg Jackie. Nuts!: Southwest Airlines' Crazy Recipe for Business and Personal Success. Bard Press Publishing, 1996.
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