APA (7th ed.) Citation

DN, Z., JWM, M., C, B., JM, E., VERA, K., & H, d. V. (2021). A referral aid for smoking cessation interventions in primary care: Study protocol for a randomized controlled trial. Primary health care research & development, 22, e22. https://doi.org/10.1017/S1463423621000244

Chicago Style (17th ed.) Citation

DN, Zijlstra, Muris JWM, Bolman C, Elling JM, Knapen VERA, and de Vries H. "A Referral Aid for Smoking Cessation Interventions in Primary Care: Study Protocol for a Randomized Controlled Trial." Primary Health Care Research & Development 22 (2021): e22. https://doi.org/10.1017/S1463423621000244.

MLA (9th ed.) Citation

DN, Zijlstra, et al. "A Referral Aid for Smoking Cessation Interventions in Primary Care: Study Protocol for a Randomized Controlled Trial." Primary Health Care Research & Development, vol. 22, 2021, p. e22, https://doi.org/10.1017/S1463423621000244.