APA (7th ed.) Citation

Eassey, J. M., Krohn, M. D., & Gibson, C. L. (2014). Using a group-based trajectory approach to assess risk and protective factors of marijuana use. Journal of drug issues. doi:10.1177/0022042614542508

Chicago Style (17th ed.) Citation

Eassey, John M., Marvin D. Krohn, and Chris L. Gibson. "Using a Group-based Trajectory Approach to Assess Risk and Protective Factors of Marijuana Use." Journal of Drug Issues 2014. https://doi.org/10.1177/0022042614542508.

MLA (9th ed.) Citation

Eassey, John M., et al. "Using a Group-based Trajectory Approach to Assess Risk and Protective Factors of Marijuana Use." Journal of Drug Issues, 2014, https://doi.org/10.1177/0022042614542508.