| APA | EWPI. (2012, February 17). In Acronym Geek. Retrieved 07:38, February 17, 2012, from http://www.acronymgeek.com/EWPI |
| MLA | "EWPI." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/EWPI>. |
| MHRA | 'EWPI', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/EWPI> [accessed 17 February 2012] |
| Chicago | "EWPI", http://www.acronymgeek.com/EWPI (accessed February 17, 2012). |
| CBE/CSE | EWPI [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/EWPI. |
| Bluebook | EWPI, http://www.acronymgeek.com/EWPI (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EWPI, http://www.acronymgeek.com/EWPI (optional description here) (as of Feb. 17, 2012, 07:38). |
| AMA | EWPI. Acronym Geek. February 17, 2012, 07:38. Available at: http://www.acronymgeek.com/EWPI. Accessed February 17, 2012, 07:38. |