Semba, R. D. (2012). The Vitamin A Story: Lifting the Shadow of Death. Karger.
Cita Chicago (17th ed.)Semba, Richard D. The Vitamin A Story: Lifting the Shadow of Death. Karger, 2012.
Cita MLA (9th ed.)Semba, Richard D. The Vitamin A Story: Lifting the Shadow of Death. Karger, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.