Cita APA (7th ed.)

Roenneberg, T. (2012). Internal time: Chronotypes, social jet lag, and why you're so tired. Harvard University Press.

Cita Chicago (17th ed.)

Roenneberg, Till. Internal Time: Chronotypes, Social Jet Lag, and Why You're so Tired. Cambridge, Mass.: Harvard University Press, 2012.

Cita MLA (9th ed.)

Roenneberg, Till. Internal Time: Chronotypes, Social Jet Lag, and Why You're so Tired. Harvard University Press, 2012.