Bisgard, K. M., Hardy, I. R., Popovic, T., Strebel, P. M., Wharton, M., Chen, R. T., & Hadler, S. C. (1998). Respiratory diphtheria in the United States, 1980 through 1995.

Bisgard, K M., I R. Hardy, T. Popovic, P M. Strebel, M. Wharton, R T. Chen, و S C. Hadler. Respiratory Diphtheria in the United States, 1980 Through 1995. 1998.

Bisgard, K M., et al. Respiratory Diphtheria in the United States, 1980 Through 1995. 1998.