Parrott, A., Li-Tzy, W., Parrott, A. C., Ringwalt, C. L., Yang, C., & Blazer, D. G. (2009). The Variety of Ecstasy/MDMA Users: Results from the National Epidemiologic Survey on Alcohol and Related Conditions. American Journal on Addictions, 18(6), pp. 452-461. doi:10.3109/10550490903206049

Parrott, Andrew, Wu Li-Tzy, Andy C. Parrott, Christopher L. Ringwalt, Chongming Yang, and Dan G. Blazer. "The Variety of Ecstasy/MDMA Users: Results From the National Epidemiologic Survey On Alcohol and Related Conditions." American Journal On Addictions 18, no. 6 (2009): 452-461.

Parrott, Andrew, et al. "The Variety of Ecstasy/MDMA Users: Results From the National Epidemiologic Survey On Alcohol and Related Conditions." American Journal On Addictions 18.6 (2009): 452-461.