Cita APA

Madison, J. M., & Irwin, R. S. (1998). Chronic obstructive pulmonary disease. Lancet.

Chicago Style Citation

Madison, J Mark, i Richard S. Irwin. "Chronic Obstructive Pulmonary Disease." Lancet 1998.

Cita MLA

Madison, J Mark, i Richard S. Irwin. "Chronic Obstructive Pulmonary Disease." Lancet 1998.

Atenció: Aquestes cites poden no estar 100% correctes.