Dyfyniad APA

Bonita, R. B. (2006). Basic epidemiology (2nd.). World Health Organization.

Dyfyniad Arddull Chicago

Bonita, R. Beaglehole. Basic Epidemiology. 2nd. Geneva: World Health Organization, 2006.

Dyfyniad MLA

Bonita, R. Beaglehole. Basic Epidemiology. 2nd. World Health Organization, 2006.

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