| APA | 989. (2012, February 10). In Acronym Geek. Retrieved 09:44, February 10, 2012, from http://www.acronymgeek.com/989 |
| MLA | "989." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/989>. |
| MHRA | '989', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/989> [accessed 10 February 2012] |
| Chicago | "989", http://www.acronymgeek.com/989 (accessed February 10, 2012). |
| CBE/CSE | 989 [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/989. |
| Bluebook | 989, http://www.acronymgeek.com/989 (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 989, http://www.acronymgeek.com/989 (optional description here) (as of Feb. 10, 2012, 09:44). |
| AMA | 989. Acronym Geek. February 10, 2012, 09:44. Available at: http://www.acronymgeek.com/989. Accessed February 10, 2012, 09:44. |