| APA | PORTSM. (2012, February 10). In Acronym Geek. Retrieved 09:34, February 10, 2012, from http://www.acronymgeek.com/PORTSM |
| MLA | "PORTSM." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/PORTSM>. |
| MHRA | 'PORTSM', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/PORTSM> [accessed 10 February 2012] |
| Chicago | "PORTSM", http://www.acronymgeek.com/PORTSM (accessed February 10, 2012). |
| CBE/CSE | PORTSM [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/PORTSM. |
| Bluebook | PORTSM, http://www.acronymgeek.com/PORTSM (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PORTSM, http://www.acronymgeek.com/PORTSM (optional description here) (as of Feb. 10, 2012, 09:34). |
| AMA | PORTSM. Acronym Geek. February 10, 2012, 09:34. Available at: http://www.acronymgeek.com/PORTSM. Accessed February 10, 2012, 09:34. |