Strait, D., Grine, F., Asfaw, B., White, T., Lovejoy, C., Latimer, B., Simpson, S., Suwa, G., & McCollum, M. (1999). Cladistics and Early Hominid Phylogeny. Science. https://doi.org/10.1126/science.285.5431.1209c
Strait, David, Frederick Grine, Berhane Asfaw, Tim White, C. Lovejoy, Bruce Latimer, Scott Simpson, Gen Suwa, and Melanie McCollum. 1999. “Cladistics and Early Hominid Phylogeny”. Science. https://doi.org/10.1126/science.285.5431.1209c.
Strait, D., F. Grine, B. Asfaw, T. White, C. Lovejoy, B. Latimer, S. Simpson, G. Suwa, and M. McCollum. Cladistics and Early Hominid Phylogeny. Science, 20 Aug. 1999, doi:10.1126/science.285.5431.1209c.