| APA | XL. (2012, February 9). In Acronym Geek. Retrieved 17:59, February 9, 2012, from http://www.acronymgeek.com/XL |
| MLA | "XL." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/XL>. |
| MHRA | 'XL', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/XL> [accessed 9 February 2012] |
| Chicago | "XL", http://www.acronymgeek.com/XL (accessed February 9, 2012). |
| CBE/CSE | XL [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/XL. |
| Bluebook | XL, http://www.acronymgeek.com/XL (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XL, http://www.acronymgeek.com/XL (optional description here) (as of Feb. 9, 2012, 17:59). |
| AMA | XL. Acronym Geek. February 9, 2012, 17:59. Available at: http://www.acronymgeek.com/XL. Accessed February 9, 2012, 17:59. |