Não informado. (1985). Canadian Journal of Cardiology. Pulsus Group.
Lua i Stíl Chicago (17ú heag.)Não informado. Canadian Journal of Cardiology. Ontario, Canada: Pulsus Group, 1985.
Lua MLA (8ú heag.)Não informado. Canadian Journal of Cardiology. Pulsus Group, 1985.
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