APA
Billings C. G., Lewis R., Armstrong I. J., Hurdman J. A., Smith I. A., Austin M., Elliot C. A., Charalampopoulos A., Sabroe I., Lawrie A., Thompson A. A. R., Condliffe R. & Kiely D. G. (2018). Incremental Shuttle Walking Test Distance Is Reduced in Patients With Pulmonary Hypertension in World Health Organisation Functional Class I. : Frontiers in medicine.
Chicago
Billings Catherine G, Lewis Robert, Armstrong Iain J, Hurdman Judith A, Smith Ian A, Austin Matthew, Elliot Charlie A, Charalampopoulos Athanasios, Sabroe Ian, Lawrie Allan, Thompson A A Roger, Condliffe Robin and Kiely David G. 2018. Incremental Shuttle Walking Test Distance Is Reduced in Patients With Pulmonary Hypertension in World Health Organisation Functional Class I. : Frontiers in medicine.
Harvard
Billings C. G., Lewis R., Armstrong I. J., Hurdman J. A., Smith I. A., Austin M., Elliot C. A., Charalampopoulos A., Sabroe I., Lawrie A., Thompson A. A. R., Condliffe R. and Kiely D. G. (2018). Incremental Shuttle Walking Test Distance Is Reduced in Patients With Pulmonary Hypertension in World Health Organisation Functional Class I. : Frontiers in medicine.
MLA
Billings Catherine G, Lewis Robert, Armstrong Iain J, Hurdman Judith A, Smith Ian A, Austin Matthew, Elliot Charlie A, Charalampopoulos Athanasios, Sabroe Ian, Lawrie Allan, Thompson A A Roger, Condliffe Robin and Kiely David G. Incremental Shuttle Walking Test Distance Is Reduced in Patients With Pulmonary Hypertension in World Health Organisation Functional Class I. : Frontiers in medicine. 2018.