| APA | 28. (2012, February 14). In Acronym Geek. Retrieved 06:51, February 14, 2012, from http://www.acronymgeek.com/28 |
| MLA | "28." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/28>. |
| MHRA | '28', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/28> [accessed 14 February 2012] |
| Chicago | "28", http://www.acronymgeek.com/28 (accessed February 14, 2012). |
| CBE/CSE | 28 [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/28. |
| Bluebook | 28, http://www.acronymgeek.com/28 (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 28, http://www.acronymgeek.com/28 (optional description here) (as of Feb. 14, 2012, 06:51). |
| AMA | 28. Acronym Geek. February 14, 2012, 06:51. Available at: http://www.acronymgeek.com/28. Accessed February 14, 2012, 06:51. |