At the roots of the mammalian family tree.

MLA

Rowe, T. “At the Roots of the Mammalian Family Tree.” Nature, vol. 398, no. 6725, Mar. 1999, pp. 283–84. EBSCOhost, https://doi.org/10.1038/18546.

APA

Rowe, T. (1999). At the roots of the mammalian family tree. Nature, 398(6725), 283–284. https://doi.org/10.1038/18546

Chicago

Rowe, T. 1999. “At the Roots of the Mammalian Family Tree.” Nature 398 (6725): 283–84. doi:10.1038/18546.