Gracey, D. R. (1981). Pulmonary disease in the adult. Year Book.
Cita Chicago Style (17a ed.)Gracey, Douglas R. Pulmonary Disease in the Adult. Year Book, 1981.
Cita MLA (9a ed.)Gracey, Douglas R. Pulmonary Disease in the Adult. Year Book, 1981.
Precaución: Estas citas no son 100% exactas.