Hirsch, P. J., Urbaniak, J. R., Greene, W. B., Chapman, M. W., Morrey, B. F., Delee, J. C., & Weinstein, S. L. (1999). James D. Heckman, M.D., To lead the journal. Journal of Bone and Joint Surgery, 81(12), 1661. https://doi.org/10.2106/00004623-199912000-00001

Hirsch, P. J., J. R. Urbaniak, W. B. Greene, M. W. Chapman, B. F. Morrey, J. C. Delee, and S. L. Weinstein. “James D. Heckman, M.D., To lead the journal.” Journal of Bone and Joint Surgery 81, no. 12 (January 1, 1999): 1661. https://doi.org/10.2106/00004623-199912000-00001.

Hirsch PJ, Urbaniak JR, Greene WB, Chapman MW, Morrey BF, Delee JC, et al. James D. Heckman, M.D., To lead the journal. Journal of Bone and Joint Surgery. 1999 Jan 1;81(12):1661.

Hirsch, P. J., et al. “James D. Heckman, M.D., To lead the journal.” Journal of Bone and Joint Surgery, vol. 81, no. 12, Jan. 1999, p. 1661. Scopus, doi:10.2106/00004623-199912000-00001.

Hirsch PJ, Urbaniak JR, Greene WB, Chapman MW, Morrey BF, Delee JC, Weinstein SL. James D. Heckman, M.D., To lead the journal. Journal of Bone and Joint Surgery. 1999 Jan 1;81(12):1661.