Bernardi, B. (1985). Age class systems: Social institutions and politics based on age. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBernardi, Bernardo. Age Class Systems: Social Institutions and Politics Based on Age. Cambridge University Press, 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBernardi, Bernardo. Age Class Systems: Social Institutions and Politics Based on Age. Cambridge University Press, 1985.
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