| APA | PORTSUM. (2012, February 12). In Acronym Geek. Retrieved 09:19, February 12, 2012, from http://www.acronymgeek.com/PORTSUM |
| MLA | "PORTSUM." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/PORTSUM>. |
| MHRA | 'PORTSUM', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/PORTSUM> [accessed 12 February 2012] |
| Chicago | "PORTSUM", http://www.acronymgeek.com/PORTSUM (accessed February 12, 2012). |
| CBE/CSE | PORTSUM [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/PORTSUM. |
| Bluebook | PORTSUM, http://www.acronymgeek.com/PORTSUM (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PORTSUM, http://www.acronymgeek.com/PORTSUM (optional description here) (as of Feb. 12, 2012, 09:19). |
| AMA | PORTSUM. Acronym Geek. February 12, 2012, 09:19. Available at: http://www.acronymgeek.com/PORTSUM. Accessed February 12, 2012, 09:19. |