APA (7e ed.) Bronvermelding
Hughes, M. (1989). Bodyclock: The effects of time on human health. Facts on File.
Chicago (17e ed.) Bronvermelding
Hughes, Martin. Bodyclock: The Effects of Time on Human Health. New York: Facts on File, 1989.
MLA (9e ed.) Bronvermelding
Hughes, Martin. Bodyclock: The Effects of Time on Human Health. Facts on File, 1989.
Let op: Deze citaties zijn niet altijd 100% accuraat.