Hillis, L. D. (1980). Manual of clinical problems in cardiology with anotated key references. Little, Brown.
Lua i Stíl Chicago (17ú heag.)Hillis, L. David. Manual of Clinical Problems in Cardiology with Anotated Key References. Little, Brown, 1980.
Lua MLA (9ú heag.)Hillis, L. David. Manual of Clinical Problems in Cardiology with Anotated Key References. Little, Brown, 1980.
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