| APA | PORTIE. (2012, February 11). In Acronym Geek. Retrieved 06:43, February 11, 2012, from http://www.acronymgeek.com/PORTIE |
| MLA | "PORTIE." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/PORTIE>. |
| MHRA | 'PORTIE', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/PORTIE> [accessed 11 February 2012] |
| Chicago | "PORTIE", http://www.acronymgeek.com/PORTIE (accessed February 11, 2012). |
| CBE/CSE | PORTIE [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/PORTIE. |
| Bluebook | PORTIE, http://www.acronymgeek.com/PORTIE (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PORTIE, http://www.acronymgeek.com/PORTIE (optional description here) (as of Feb. 11, 2012, 06:43). |
| AMA | PORTIE. Acronym Geek. February 11, 2012, 06:43. Available at: http://www.acronymgeek.com/PORTIE. Accessed February 11, 2012, 06:43. |