Citação norma APA

Nohlert, E., Öhrvik, J., & Helgason, Á. R. (2014). Effectiveness of proactive and reactive services at the Swedish National Tobacco Quitline in a randomized trial. BioMed Central.

Citação norma Chicago

Nohlert, Eva, John Öhrvik, and Ásgeir R. Helgason. Effectiveness of Proactive and Reactive Services At the Swedish National Tobacco Quitline in a Randomized Trial. BioMed Central, 2014.

Citação norma MLA

Nohlert, Eva, John Öhrvik, and Ásgeir R. Helgason. Effectiveness of Proactive and Reactive Services At the Swedish National Tobacco Quitline in a Randomized Trial. BioMed Central, 2014.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.