If you are researching health promotion and the effectiveness of interventions used to help pregnant women stop smoking, you may be interested to read the recently updated Cochrane Systematic Review. Read about it and access it full text by following this link
If you need to reference it (APA 6th style) here’s how:
(2017). Psychosocial interventions for supporting women to stop smoking in pregnancy. Cochrane Database of Systematic Reviews (2). doi: 10.1002/14651858.CD001055.pub5, , , , , , & .