Hammer, G. P., du Prel, J., & Blettner, M. (2009). Avoiding Bias in Observational Studies: Part 8 in a Series of Articles on Evaluation of Scientific Publications. Deutscher Arzte Verlag.
Citação norma ChicagoHammer, Gaël P., Jean-Baptist du Prel, and Maria Blettner. Avoiding Bias in Observational Studies: Part 8 in a Series of Articles On Evaluation of Scientific Publications. Deutscher Arzte Verlag, 2009.
Citação norma MLAHammer, Gaël P., Jean-Baptist du Prel, and Maria Blettner. Avoiding Bias in Observational Studies: Part 8 in a Series of Articles On Evaluation of Scientific Publications. Deutscher Arzte Verlag, 2009.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.