| APA | 18. (2012, February 14). In Acronym Geek. Retrieved 06:11, February 14, 2012, from http://www.acronymgeek.com/18 |
| MLA | "18." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/18>. |
| MHRA | '18', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/18> [accessed 14 February 2012] |
| Chicago | "18", http://www.acronymgeek.com/18 (accessed February 14, 2012). |
| CBE/CSE | 18 [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/18. |
| Bluebook | 18, http://www.acronymgeek.com/18 (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 18, http://www.acronymgeek.com/18 (optional description here) (as of Feb. 14, 2012, 06:11). |
| AMA | 18. Acronym Geek. February 14, 2012, 06:11. Available at: http://www.acronymgeek.com/18. Accessed February 14, 2012, 06:11. |