ebrary, Inc, Nelson, R. J., Denlinger, D. L., & Somers, D. E. (2009). Photoperiodism: The biological calendar. Oxford University Press.
芝加哥风格引文ebrary, Inc, Randy Joe Nelson, David L. Denlinger, 与 David E. Somers. Photoperiodism: The Biological Calendar. Oxford ; New York: Oxford University Press, 2009.
MLA引文ebrary, Inc, et al. Photoperiodism: The Biological Calendar. Oxford University Press, 2009.
警告：这些引文格式不一定是100％准确.