Gaya APA

Colen, B. (1983). THE COPD MEDICAL DIARY : 365 DAYS OF BETTER BREATHING . New york: The C.V Mosby Company.

Gaya MLA

Colen, B.D. "THE COPD MEDICAL DIARY : 365 DAYS OF BETTER BREATHING". New york: The C.V Mosby Company, 1983. Text.