APA-čujuhus (7. p.)
Hughes, M. (1989). Bodyclock: The effects of time on human health. Facts on File.
Chicago-čujuhus (17. p.)
Hughes, Martin. Bodyclock: The Effects of Time on Human Health. New York: Facts on File, 1989.
MLA-čujuhus (9. p.)
Hughes, Martin. Bodyclock: The Effects of Time on Human Health. Facts on File, 1989.
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