| APA | XIX. (2012, February 11). In Acronym Geek. Retrieved 22:31, February 11, 2012, from http://www.acronymgeek.com/XIX |
| MLA | "XIX." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/XIX>. |
| MHRA | 'XIX', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/XIX> [accessed 11 February 2012] |
| Chicago | "XIX", http://www.acronymgeek.com/XIX (accessed February 11, 2012). |
| CBE/CSE | XIX [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/XIX. |
| Bluebook | XIX, http://www.acronymgeek.com/XIX (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XIX, http://www.acronymgeek.com/XIX (optional description here) (as of Feb. 11, 2012, 22:31). |
| AMA | XIX. Acronym Geek. February 11, 2012, 22:31. Available at: http://www.acronymgeek.com/XIX. Accessed February 11, 2012, 22:31. |