Crapo, R. O., Hankinson, J. L., Irvin, C., MacIntyre, N. R., Voter, K. Z., Wise, R. A., & Graham, B. (1995). Single-breath carbon monoxide diffusing capacity (transfer factor): Recommendations for a standard technique-1995 update. American Journal of Respiratory and Critical Care Medicine, 152(6 I), 2185–2198.

Crapo, R. O., J. L. Hankinson, C. Irvin, N. R. MacIntyre, K. Z. Voter, R. A. Wise, and B. Graham. “Single-breath carbon monoxide diffusing capacity (transfer factor): Recommendations for a standard technique-1995 update.” American Journal of Respiratory and Critical Care Medicine 152, no. 6 I (January 1, 1995): 2185–98.

Crapo RO, Hankinson JL, Irvin C, MacIntyre NR, Voter KZ, Wise RA, et al. Single-breath carbon monoxide diffusing capacity (transfer factor): Recommendations for a standard technique-1995 update. American Journal of Respiratory and Critical Care Medicine. 1995 Jan 1;152(6 I):2185–98.

Crapo, R. O., et al. “Single-breath carbon monoxide diffusing capacity (transfer factor): Recommendations for a standard technique-1995 update.” American Journal of Respiratory and Critical Care Medicine, vol. 152, no. 6 I, Jan. 1995, pp. 2185–98.

Crapo RO, Hankinson JL, Irvin C, MacIntyre NR, Voter KZ, Wise RA, Graham B. Single-breath carbon monoxide diffusing capacity (transfer factor): Recommendations for a standard technique-1995 update. American Journal of Respiratory and Critical Care Medicine. 1995 Jan 1;152(6 I):2185–2198.