Παραπομπή APA

Scheffels, J., Lund, K. E., & McNeill, A. (2012). Contrasting snus and NRT as methods to quit smoking. an observational study. BioMed Central.

Παραπομπή Chicago Style

Scheffels, Janne, Karl E. Lund, και Ann McNeill. Contrasting Snus and NRT As Methods to Quit Smoking. an Observational Study. BioMed Central, 2012.

Παραπομπή MLA

Scheffels, Janne, Karl E. Lund, και Ann McNeill. Contrasting Snus and NRT As Methods to Quit Smoking. an Observational Study. BioMed Central, 2012.

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