| APA | PAST. (2012, February 16). In Acronym Geek. Retrieved 20:58, February 16, 2012, from http://www.acronymgeek.com/PAST |
| MLA | "PAST." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PAST>. |
| MHRA | 'PAST', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PAST> [accessed 16 February 2012] |
| Chicago | "PAST", http://www.acronymgeek.com/PAST (accessed February 16, 2012). |
| CBE/CSE | PAST [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PAST. |
| Bluebook | PAST, http://www.acronymgeek.com/PAST (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PAST, http://www.acronymgeek.com/PAST (optional description here) (as of Feb. 16, 2012, 20:58). |
| AMA | PAST. Acronym Geek. February 16, 2012, 20:58. Available at: http://www.acronymgeek.com/PAST. Accessed February 16, 2012, 20:58. |