| APA | POR-S. (2012, February 12). In Acronym Geek. Retrieved 12:02, February 12, 2012, from http://www.acronymgeek.com/POR-S |
| MLA | "POR-S." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/POR-S>. |
| MHRA | 'POR-S', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/POR-S> [accessed 12 February 2012] |
| Chicago | "POR-S", http://www.acronymgeek.com/POR-S (accessed February 12, 2012). |
| CBE/CSE | POR-S [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/POR-S. |
| Bluebook | POR-S, http://www.acronymgeek.com/POR-S (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, POR-S, http://www.acronymgeek.com/POR-S (optional description here) (as of Feb. 12, 2012, 12:02). |
| AMA | POR-S. Acronym Geek. February 12, 2012, 12:02. Available at: http://www.acronymgeek.com/POR-S. Accessed February 12, 2012, 12:02. |