APA引文

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

Citação norma Chicago

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

MLA引文

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

警告：這些引文格式不一定是100％准確.