APA (7th ed.) Citation

Merrill, L. D., Heaman, M., & Sword, W. M. (2011). Demographic and psychosocial correlates of illicit drug use in pregnancy: A mixed methods study.

Chicago Style (17th ed.) Citation

Merrill, Lisa Dawn, Maureen Heaman, and Wendy Morris Sword. Demographic and Psychosocial Correlates of Illicit Drug Use in Pregnancy: A Mixed Methods Study. 2011.

MLA (9th ed.) Citation

Merrill, Lisa Dawn, et al. Demographic and Psychosocial Correlates of Illicit Drug Use in Pregnancy: A Mixed Methods Study. 2011.