| APA | EI/IP. (2012, February 11). In Acronym Geek. Retrieved 17:50, February 11, 2012, from http://www.acronymgeek.com/EI/IP |
| MLA | "EI/IP." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/EI/IP>. |
| MHRA | 'EI/IP', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/EI/IP> [accessed 11 February 2012] |
| Chicago | "EI/IP", http://www.acronymgeek.com/EI/IP (accessed February 11, 2012). |
| CBE/CSE | EI/IP [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/EI/IP. |
| Bluebook | EI/IP, http://www.acronymgeek.com/EI/IP (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EI/IP, http://www.acronymgeek.com/EI/IP (optional description here) (as of Feb. 11, 2012, 17:50). |
| AMA | EI/IP. Acronym Geek. February 11, 2012, 17:50. Available at: http://www.acronymgeek.com/EI/IP. Accessed February 11, 2012, 17:50. |