Gaya APA
Barnett, M.
(2006).
Chronic_Obstructive_Pulmonary
.
NGANJUK:
Humbold State Univerity.
Gaya MLA
Barnett, Margaret.
"Chronic_Obstructive_Pulmonary".
NGANJUK:
Humbold State Univerity,
2006.
PERAWAT.