| APA | ESP. (2012, February 14). In Acronym Geek. Retrieved 11:09, February 14, 2012, from http://www.acronymgeek.com/ESP |
| MLA | "ESP." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ESP>. |
| MHRA | 'ESP', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ESP> [accessed 14 February 2012] |
| Chicago | "ESP", http://www.acronymgeek.com/ESP (accessed February 14, 2012). |
| CBE/CSE | ESP [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ESP. |
| Bluebook | ESP, http://www.acronymgeek.com/ESP (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ESP, http://www.acronymgeek.com/ESP (optional description here) (as of Feb. 14, 2012, 11:09). |
| AMA | ESP. Acronym Geek. February 14, 2012, 11:09. Available at: http://www.acronymgeek.com/ESP. Accessed February 14, 2012, 11:09. |