Norris, G. W., Landis, H. R. M., Krumbhaar, E. B., & Montgomery, C. M. (1929). Diseases of the chest and the principles of physical diagnosis (4th ed., rev.). W. B. Saunders Co..

Norris, George William, Henry R. M. Landis, E. B. Krumbhaar, agus Charles Mortimer Montgomery. Diseases of the Chest and the Principles of Physical Diagnosis. 4th ed., rev. Philadelphia and London: W. B. Saunders Co., 1929.

Norris, George William, et al. Diseases of the Chest and the Principles of Physical Diagnosis. 4th ed., rev. W. B. Saunders Co., 1929.