APA (7th ed.) Citation

Kahnert, K., Alter, P., Young, D., Lucke, T., Heinrich, J., Huber, R. M., . . . Jörres, R. A. (2017). The revised GOLD 2017 COPD categorization in relation to comorbidities. Respiratory medicine, 134, . https://doi.org/10.1016/j.rmed.2017.12.003

Chicago Style (17th ed.) Citation

Kahnert, Kathrin, et al. "The Revised GOLD 2017 COPD Categorization in Relation to Comorbidities." Respiratory Medicine 134 (2017). https://doi.org/10.1016/j.rmed.2017.12.003.

MLA (9th ed.) Citation

Kahnert, Kathrin, et al. "The Revised GOLD 2017 COPD Categorization in Relation to Comorbidities." Respiratory Medicine, vol. 134, 2017, https://doi.org/10.1016/j.rmed.2017.12.003.