Roenneberg, T. (2012). Internal time: Chronotypes, social jet lag, and why you're so tired. Harvard University Press.
Citace podle Chicago (17th ed.)Roenneberg, Till. Internal Time: Chronotypes, Social Jet Lag, and Why You're so Tired. Cambridge, Mass.: Harvard University Press, 2012.
Citace podle MLA (9th ed.)Roenneberg, Till. Internal Time: Chronotypes, Social Jet Lag, and Why You're so Tired. Harvard University Press, 2012.
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