| APA | ASPO. (2012, February 10). In Acronym Geek. Retrieved 10:23, February 10, 2012, from http://www.acronymgeek.com/ASPO |
| MLA | "ASPO." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/ASPO>. |
| MHRA | 'ASPO', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/ASPO> [accessed 10 February 2012] |
| Chicago | "ASPO", http://www.acronymgeek.com/ASPO (accessed February 10, 2012). |
| CBE/CSE | ASPO [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/ASPO. |
| Bluebook | ASPO, http://www.acronymgeek.com/ASPO (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ASPO, http://www.acronymgeek.com/ASPO (optional description here) (as of Feb. 10, 2012, 10:23). |
| AMA | ASPO. Acronym Geek. February 10, 2012, 10:23. Available at: http://www.acronymgeek.com/ASPO. Accessed February 10, 2012, 10:23. |