Malouf, R., & Areosa Sastre, A. (2003). Vitamin B12 for cognition. Cochrane Collaboration.
Cita Chicago (17th ed.)Malouf, R., i A. Areosa Sastre. Vitamin B12 for Cognition. Cochrane Collaboration, 2003.
Cita MLA (9th ed.)Malouf, R., i A. Areosa Sastre. Vitamin B12 for Cognition. Cochrane Collaboration, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.