References:

American Association for Respiratory Care
Clinical Practice Guideline
Spirometry, 1996 Update
(Accessed 09-11-06)

National Lung Health Education Program
Spirometry
Accessed (09-11-06)

Third National Health and Nutrition Examination Survey III.
Center for Disease Control
Spirometry Procedure Manual (PDF)
Accessed (09-11-06)

Dr Tom's Commentary on Spirometry.
Accessed (09-11-06)