Lockley, S. W. (2012). Sleep: A Very Short Introduction (1st.). Oxford.
Čikaški stil citiranja (17. izdanje)Lockley, Steven W. Sleep: A Very Short Introduction. 1st. Oxford, 2012.
MLA način citiranja (9. izdanje)Lockley, Steven W. Sleep: A Very Short Introduction. 1st. Oxford, 2012.
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