| APA | H4XX0R. (2012, February 10). In Acronym Geek. Retrieved 09:37, February 10, 2012, from http://www.acronymgeek.com/H4XX0R |
| MLA | "H4XX0R." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/H4XX0R>. |
| MHRA | 'H4XX0R', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/H4XX0R> [accessed 10 February 2012] |
| Chicago | "H4XX0R", http://www.acronymgeek.com/H4XX0R (accessed February 10, 2012). |
| CBE/CSE | H4XX0R [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/H4XX0R. |
| Bluebook | H4XX0R, http://www.acronymgeek.com/H4XX0R (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, H4XX0R, http://www.acronymgeek.com/H4XX0R (optional description here) (as of Feb. 10, 2012, 09:37). |
| AMA | H4XX0R. Acronym Geek. February 10, 2012, 09:37. Available at: http://www.acronymgeek.com/H4XX0R. Accessed February 10, 2012, 09:37. |