APA-čujuhus (7. p.)
ebrary, Inc, Nelson, R. J., Denlinger, D. L., & Somers, D. E. (2009). Photoperiodism: The biological calendar. Oxford University Press.
Chicago-čujuhus (17. p.)
ebrary, Inc, Randy Joe Nelson, David L. Denlinger, juo David E. Somers. Photoperiodism: The Biological Calendar. Oxford ; New York: Oxford University Press, 2009.
MLA-čujuhus (9. p.)
ebrary, Inc, et al. Photoperiodism: The Biological Calendar. Oxford University Press, 2009.
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