APA   Click to copy
Cowgill, L. W., Warrener, A., Pontzer, H., & Ocobock, C. J. (2010). Waddling and toddling: the biomechanical effects of an immature gait. American Journal of Physical Anthropology, 143, 52–61.

Chicago/Turabian   Click to copy
Cowgill, Libby W., A. Warrener, H. Pontzer, and Cara J Ocobock. “Waddling and Toddling: the Biomechanical Effects of an Immature Gait.” American journal of physical anthropology 143 (2010): 52–61.

MLA   Click to copy
Cowgill, Libby W., et al. “Waddling and Toddling: the Biomechanical Effects of an Immature Gait.” American Journal of Physical Anthropology, vol. 143, 2010, pp. 52–61.

@article{libby2010a,
  title = {Waddling and toddling: the biomechanical effects of an immature gait.},
  year = {2010},
  journal = {American journal of physical anthropology},
  pages = {52-61},
  volume = {143},
  author = {Cowgill, Libby W. and Warrener, A. and Pontzer, H. and Ocobock, Cara J}
}