Cita APA

Helmer, S. M., Mikolajczyk, R. T., McAlaney, J., Vriesacker, B., & Guillén Grima, F. (2014). Illicit substance use among university students from seven European countries: A comparison of personal and perceived peer use and attitudes towards illicit substance use.

Citación estilo Chicago

Helmer, Stefanie M., Rafael T. Mikolajczyk, John McAlaney, Bart Vriesacker, y Francisco Guillén Grima. Illicit Substance Use Among University Students From Seven European Countries: A Comparison of Personal and Perceived Peer Use and Attitudes Towards Illicit Substance Use. 2014.

Cita MLA

Helmer, Stefanie M., et al. Illicit Substance Use Among University Students From Seven European Countries: A Comparison of Personal and Perceived Peer Use and Attitudes Towards Illicit Substance Use. 2014.