Gaya APA
Condition, T, N, C, C, F, C. (2004).
Chronic Obstructive Pulmanory Disease .
Maryland:
F A DAVIS COMPANY.
Gaya MLA
Condition, The, National, Collaborating, Center, For, Chronic.
"Chronic Obstructive Pulmanory Disease".
Maryland:
F A DAVIS COMPANY,
2004.
PERAWAT.