Friel, J. K. (2000). Folic acid supplementation: More work is needed. CMAJ.
Chicago Style CitationFriel, James K. "Folic Acid Supplementation: More Work Is Needed." CMAJ 2000.
Cita MLAFriel, James K. "Folic Acid Supplementation: More Work Is Needed." CMAJ 2000.
Atenció: Aquestes cites poden no estar 100% correctes.