APA način citiranja

Friel, J. K. (2000). Folic acid supplementation: More work is needed. CMAJ.

Čikaški stil citiranja

Friel, James K. "Folic Acid Supplementation: More Work Is Needed." CMAJ 2000.

MLA način citiranja

Friel, James K. "Folic Acid Supplementation: More Work Is Needed." CMAJ 2000.

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