| APA | COPD. (2012, February 10). In Acronym Geek. Retrieved 11:40, February 10, 2012, from http://www.acronymgeek.com/COPD |
| MLA | "COPD." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/COPD>. |
| MHRA | 'COPD', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/COPD> [accessed 10 February 2012] |
| Chicago | "COPD", http://www.acronymgeek.com/COPD (accessed February 10, 2012). |
| CBE/CSE | COPD [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/COPD. |
| Bluebook | COPD, http://www.acronymgeek.com/COPD (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, COPD, http://www.acronymgeek.com/COPD (optional description here) (as of Feb. 10, 2012, 11:40). |
| AMA | COPD. Acronym Geek. February 10, 2012, 11:40. Available at: http://www.acronymgeek.com/COPD. Accessed February 10, 2012, 11:40. |