Cita APA (7th ed.)
ebrary, Inc, Hedges, S. B., & Kumar, S. (2009). The timetree of life. Oxford University Press.
Cita Chicago (17th ed.)
ebrary, Inc, S. Blair Hedges, i Sudhir Kumar. The Timetree of Life. Oxford ; New York: Oxford University Press, 2009.
Cita MLA (9th ed.)
ebrary, Inc, et al. The Timetree of Life. Oxford University Press, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.