| APA | 90. (2012, February 11). In Acronym Geek. Retrieved 21:49, February 11, 2012, from http://www.acronymgeek.com/90 |
| MLA | "90." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/90>. |
| MHRA | '90', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/90> [accessed 11 February 2012] |
| Chicago | "90", http://www.acronymgeek.com/90 (accessed February 11, 2012). |
| CBE/CSE | 90 [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/90. |
| Bluebook | 90, http://www.acronymgeek.com/90 (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 90, http://www.acronymgeek.com/90 (optional description here) (as of Feb. 11, 2012, 21:49). |
| AMA | 90. Acronym Geek. February 11, 2012, 21:49. Available at: http://www.acronymgeek.com/90. Accessed February 11, 2012, 21:49. |