Callahan, D. (1995). Setting limits: Medical goals in an aging society. Georgetown University Press.
Lua i Stíl Chicago (17ú heag.)Callahan, Daniel. Setting Limits: Medical Goals in an Aging Society. Washington, D.C.: Georgetown University Press, 1995.
Lua MLA (9ú heag.)Callahan, Daniel. Setting Limits: Medical Goals in an Aging Society. Georgetown University Press, 1995.
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