Gracey, D. R. (1981). Pulmonary disease in the adult. Year Book.
Cita Chicago (17th ed.)Gracey, Douglas R. Pulmonary Disease in the Adult. Year Book, 1981.
Cita MLA (9th ed.)Gracey, Douglas R. Pulmonary Disease in the Adult. Year Book, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.