| APA | NOIP. (2012, February 15). In Acronym Geek. Retrieved 18:23, February 15, 2012, from http://www.acronymgeek.com/NOIP |
| MLA | "NOIP." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/NOIP>. |
| MHRA | 'NOIP', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/NOIP> [accessed 15 February 2012] |
| Chicago | "NOIP", http://www.acronymgeek.com/NOIP (accessed February 15, 2012). |
| CBE/CSE | NOIP [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/NOIP. |
| Bluebook | NOIP, http://www.acronymgeek.com/NOIP (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NOIP, http://www.acronymgeek.com/NOIP (optional description here) (as of Feb. 15, 2012, 18:23). |
| AMA | NOIP. Acronym Geek. February 15, 2012, 18:23. Available at: http://www.acronymgeek.com/NOIP. Accessed February 15, 2012, 18:23. |