| APA | IMPO. (2012, February 15). In Acronym Geek. Retrieved 07:11, February 15, 2012, from http://www.acronymgeek.com/IMPO |
| MLA | "IMPO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/IMPO>. |
| MHRA | 'IMPO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/IMPO> [accessed 15 February 2012] |
| Chicago | "IMPO", http://www.acronymgeek.com/IMPO (accessed February 15, 2012). |
| CBE/CSE | IMPO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/IMPO. |
| Bluebook | IMPO, http://www.acronymgeek.com/IMPO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IMPO, http://www.acronymgeek.com/IMPO (optional description here) (as of Feb. 15, 2012, 07:11). |
| AMA | IMPO. Acronym Geek. February 15, 2012, 07:11. Available at: http://www.acronymgeek.com/IMPO. Accessed February 15, 2012, 07:11. |