Não informado. (2000). University of California publications in public health. University of California.
Čikaški stil citiranja (17. izdanje)Não informado. University of California Publications in Public Health. Berkeley, Calif: University of California, 2000.
MLA način citiranja (8. izdanje)Não informado. University of California Publications in Public Health. University of California, 2000.
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