Gracey, D. R. (1981). Pulmonary disease in the adult. Year Book.
Lua i Stíl Chicago (17ú heag.)Gracey, Douglas R. Pulmonary Disease in the Adult. Year Book, 1981.
Lua MLA (9ú heag.)Gracey, Douglas R. Pulmonary Disease in the Adult. Year Book, 1981.
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