Assessment tools for the measurement of the self-efficacy of drug users: protocol for a systematic review.

MLA

Vasconcelos, Selene Cordeiro, et al. “Assessment Tools for the Measurement of the Self-Efficacy of Drug Users: Protocol for a Systematic Review.” BMJ Open, vol. 8, no. 3, Mar. 2018, p. e019019. EBSCOhost, https://doi.org/10.1136/bmjopen-2017-019019.

APA

Vasconcelos, S. C., Frazão, I. da S., Sougey, E. B., Souza, S. L. de, Silva, T. de P. S. da, & Lima, M. D. da C. (2018). Assessment tools for the measurement of the self-efficacy of drug users: protocol for a systematic review. BMJ Open, 8(3), e019019. https://doi.org/10.1136/bmjopen-2017-019019

Chicago

Vasconcelos, Selene Cordeiro, Iracema da Silva Frazão, Everton Botelho Sougey, Sandra Lopes de Souza, Tatiana de Paula Santana da Silva, and Murilo Duarte da Costa Lima. 2018. “Assessment Tools for the Measurement of the Self-Efficacy of Drug Users: Protocol for a Systematic Review.” BMJ Open 8 (3): e019019. doi:10.1136/bmjopen-2017-019019.