Kellner, M., Muhtz, C., & Nowack, S. (2018). Effects of 35% carbon dioxide (CO 2) inhalation in patients with post-traumatic stress disorder (PTSD): A double-blind, randomized, placebo-controlled, cross-over trial. Journal of Psychiatric Research. https://doi.org/10.1016/j.jpsychires.2017.10.019
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Kellner, Michael, Christoph Muhtz, و Sven Nowack. "Effects of 35% Carbon Dioxide (CO 2) Inhalation in Patients with Post-traumatic Stress Disorder (PTSD): A Double-blind, Randomized, Placebo-controlled, Cross-over Trial." Journal of Psychiatric Research 2018. https://doi.org/10.1016/j.jpsychires.2017.10.019.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Kellner, Michael, et al. "Effects of 35% Carbon Dioxide (CO 2) Inhalation in Patients with Post-traumatic Stress Disorder (PTSD): A Double-blind, Randomized, Placebo-controlled, Cross-over Trial." Journal of Psychiatric Research, 2018, https://doi.org/10.1016/j.jpsychires.2017.10.019.