Cita APA

Lindsey, K. P., Bracken, B. K., MacLean, R. R., Ryan, E. T., Lukas, S. E., & Frederick, B. d. (2012). Nicotine content and abstinence state have different effects on subjective ratings of positive versus negative reinforcement from smoking.

Chicago Style Citation

Lindsey, Kimberly P., Bethany K. Bracken, Robert R. MacLean, Elizabeth T. Ryan, Scott E. Lukas, i Blaise deB Frederick. Nicotine Content and Abstinence State Have Different Effects On Subjective Ratings of Positive Versus Negative Reinforcement From Smoking. 2012.

Cita MLA

Lindsey, Kimberly P., et al. Nicotine Content and Abstinence State Have Different Effects On Subjective Ratings of Positive Versus Negative Reinforcement From Smoking. 2012.