| APA | PO-209. (2012, February 12). In Acronym Geek. Retrieved 13:34, February 12, 2012, from http://www.acronymgeek.com/PO-209 |
| MLA | "PO-209." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/PO-209>. |
| MHRA | 'PO-209', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/PO-209> [accessed 12 February 2012] |
| Chicago | "PO-209", http://www.acronymgeek.com/PO-209 (accessed February 12, 2012). |
| CBE/CSE | PO-209 [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/PO-209. |
| Bluebook | PO-209, http://www.acronymgeek.com/PO-209 (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PO-209, http://www.acronymgeek.com/PO-209 (optional description here) (as of Feb. 12, 2012, 13:34). |
| AMA | PO-209. Acronym Geek. February 12, 2012, 13:34. Available at: http://www.acronymgeek.com/PO-209. Accessed February 12, 2012, 13:34. |