| APA | EC4P. (2012, February 10). In Acronym Geek. Retrieved 12:49, February 10, 2012, from http://www.acronymgeek.com/EC4P |
| MLA | "EC4P." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/EC4P>. |
| MHRA | 'EC4P', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/EC4P> [accessed 10 February 2012] |
| Chicago | "EC4P", http://www.acronymgeek.com/EC4P (accessed February 10, 2012). |
| CBE/CSE | EC4P [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/EC4P. |
| Bluebook | EC4P, http://www.acronymgeek.com/EC4P (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EC4P, http://www.acronymgeek.com/EC4P (optional description here) (as of Feb. 10, 2012, 12:49). |
| AMA | EC4P. Acronym Geek. February 10, 2012, 12:49. Available at: http://www.acronymgeek.com/EC4P. Accessed February 10, 2012, 12:49. |