| APA | PSEI. (2012, February 16). In Acronym Geek. Retrieved 23:59, February 16, 2012, from http://www.acronymgeek.com/PSEI |
| MLA | "PSEI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PSEI>. |
| MHRA | 'PSEI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PSEI> [accessed 16 February 2012] |
| Chicago | "PSEI", http://www.acronymgeek.com/PSEI (accessed February 16, 2012). |
| CBE/CSE | PSEI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PSEI. |
| Bluebook | PSEI, http://www.acronymgeek.com/PSEI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PSEI, http://www.acronymgeek.com/PSEI (optional description here) (as of Feb. 16, 2012, 23:59). |
| AMA | PSEI. Acronym Geek. February 16, 2012, 23:59. Available at: http://www.acronymgeek.com/PSEI. Accessed February 16, 2012, 23:59. |