| APA | XIII. (2012, February 16). In Acronym Geek. Retrieved 01:56, February 16, 2012, from http://www.acronymgeek.com/XIII |
| MLA | "XIII." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/XIII>. |
| MHRA | 'XIII', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/XIII> [accessed 16 February 2012] |
| Chicago | "XIII", http://www.acronymgeek.com/XIII (accessed February 16, 2012). |
| CBE/CSE | XIII [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/XIII. |
| Bluebook | XIII, http://www.acronymgeek.com/XIII (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XIII, http://www.acronymgeek.com/XIII (optional description here) (as of Feb. 16, 2012, 01:56). |
| AMA | XIII. Acronym Geek. February 16, 2012, 01:56. Available at: http://www.acronymgeek.com/XIII. Accessed February 16, 2012, 01:56. |