APA Citation

Higgins, S. T., Heil, S. H., Badger, G. J., Skelly, J. M., Solomon, L. J., & Bernstein, I. M. (2009). Educational Disadvantage and Cigarette Smoking During Pregnancy.

Citação norma Chicago

Higgins, Stephen T., Sarah H. Heil, Gary J. Badger, Joan M. Skelly, Laura J. Solomon, and Ira M. Bernstein. Educational Disadvantage and Cigarette Smoking During Pregnancy. 2009.

MLA Citation

Higgins, Stephen T., et al. Educational Disadvantage and Cigarette Smoking During Pregnancy. 2009.

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