Gaya APA
Siegfried Heyden, M.D.,. ().
The Heart Book .
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Gaya Chicago
Siegfried Heyden, M.D.,.
The Heart Book.
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,
.
Text.
Gaya MLA
Siegfried Heyden, M.D.,.
The Heart Book.
:
,
.
Text.
Gaya Turabian
Siegfried Heyden, M.D.,.
The Heart Book.
:
,
.
Print.