APA (7 वां संस्करण) प्रशस्ति पत्र
Frees, E. W. (2004). Longitudinal and panel data: Analysis and applications in the social sciences. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Frees, Edward W. Longitudinal and Panel Data: Analysis and Applications in the Social Sciences. Cambridge, UK ; New York: Cambridge University Press, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Frees, Edward W. Longitudinal and Panel Data: Analysis and Applications in the Social Sciences. Cambridge University Press, 2004.
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