| APA | 904. (2012, February 11). In Acronym Geek. Retrieved 22:01, February 11, 2012, from http://www.acronymgeek.com/904 |
| MLA | "904." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/904>. |
| MHRA | '904', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/904> [accessed 11 February 2012] |
| Chicago | "904", http://www.acronymgeek.com/904 (accessed February 11, 2012). |
| CBE/CSE | 904 [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/904. |
| Bluebook | 904, http://www.acronymgeek.com/904 (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 904, http://www.acronymgeek.com/904 (optional description here) (as of Feb. 11, 2012, 22:01). |
| AMA | 904. Acronym Geek. February 11, 2012, 22:01. Available at: http://www.acronymgeek.com/904. Accessed February 11, 2012, 22:01. |