| APA | ERRN. (2012, February 15). In Acronym Geek. Retrieved 18:05, February 15, 2012, from http://www.acronymgeek.com/ERRN |
| MLA | "ERRN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ERRN>. |
| MHRA | 'ERRN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ERRN> [accessed 15 February 2012] |
| Chicago | "ERRN", http://www.acronymgeek.com/ERRN (accessed February 15, 2012). |
| CBE/CSE | ERRN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ERRN. |
| Bluebook | ERRN, http://www.acronymgeek.com/ERRN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ERRN, http://www.acronymgeek.com/ERRN (optional description here) (as of Feb. 15, 2012, 18:05). |
| AMA | ERRN. Acronym Geek. February 15, 2012, 18:05. Available at: http://www.acronymgeek.com/ERRN. Accessed February 15, 2012, 18:05. |