APA

Bhatt S. P., Kim Y., Harrington K. F., Hokanson J. E., Lutz S. M., Cho M. H., DeMeo D. L., Wells J. M., Make B. J., Rennard S. I., Washko G. R., Foreman M. G., Tashkin D. P., Wise R. A., Dransfield M. T. & Bailey W. C. (20190103). Smoking duration alone provides stronger risk estimates of chronic obstructive pulmonary disease than pack-years. : Thorax.

Chicago

Bhatt Surya P, Kim Young-Il, Harrington Kathy F, Hokanson John E, Lutz Sharon M, Cho Michael H, DeMeo Dawn L, Wells James M, Make Barry J, Rennard Stephen I, Washko George R, Foreman Marilyn G, Tashkin Donald P, Wise Robert A, Dransfield Mark T and Bailey William C. 20190103. Smoking duration alone provides stronger risk estimates of chronic obstructive pulmonary disease than pack-years. : Thorax.

Harvard

Bhatt S. P., Kim Y., Harrington K. F., Hokanson J. E., Lutz S. M., Cho M. H., DeMeo D. L., Wells J. M., Make B. J., Rennard S. I., Washko G. R., Foreman M. G., Tashkin D. P., Wise R. A., Dransfield M. T. and Bailey W. C. (20190103). Smoking duration alone provides stronger risk estimates of chronic obstructive pulmonary disease than pack-years. : Thorax.

MLA

Bhatt Surya P, Kim Young-Il, Harrington Kathy F, Hokanson John E, Lutz Sharon M, Cho Michael H, DeMeo Dawn L, Wells James M, Make Barry J, Rennard Stephen I, Washko George R, Foreman Marilyn G, Tashkin Donald P, Wise Robert A, Dransfield Mark T and Bailey William C. Smoking duration alone provides stronger risk estimates of chronic obstructive pulmonary disease than pack-years. : Thorax. 20190103.