Guillén, M. F. (2023). The perennials: The megatrends creating a postgenerational society (First edition.). St. Martin's Press, an imprint of St. Martin's Publishing Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGuillén, Mauro F. The Perennials: The Megatrends Creating a Postgenerational Society. First edition. New York, NY: St. Martin's Press, an imprint of St. Martin's Publishing Group, 2023.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGuillén, Mauro F. The Perennials: The Megatrends Creating a Postgenerational Society. First edition. St. Martin's Press, an imprint of St. Martin's Publishing Group, 2023.
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