APA (7th ed.) Citation

Ferguson, G. T., Karpel, J., Bennett, N., Clerisme-Beaty, E., Grönke, L., Voß, F., & Buhl, R. (2017). Effect of tiotropium and olodaterol on symptoms and patient-reported outcomes in patients with COPD: Results from four randomised, double-blind studies. Nature Portfolio.

Chicago Style (17th ed.) Citation

Ferguson, Gary T., Jill Karpel, Nathan Bennett, Emmanuelle Clerisme-Beaty, Lars Grönke, Florian Voß, and Roland Buhl. Effect of Tiotropium and Olodaterol on Symptoms and Patient-reported Outcomes in Patients with COPD: Results from Four Randomised, Double-blind Studies. Nature Portfolio, 2017.

MLA (8th ed.) Citation

Ferguson, Gary T., et al. Effect of Tiotropium and Olodaterol on Symptoms and Patient-reported Outcomes in Patients with COPD: Results from Four Randomised, Double-blind Studies. Nature Portfolio, 2017.