| APA | 0420. (2012, February 9). In Acronym Geek. Retrieved 14:25, February 9, 2012, from http://www.acronymgeek.com/0420 |
| MLA | "0420." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/0420>. |
| MHRA | '0420', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/0420> [accessed 9 February 2012] |
| Chicago | "0420", http://www.acronymgeek.com/0420 (accessed February 9, 2012). |
| CBE/CSE | 0420 [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/0420. |
| Bluebook | 0420, http://www.acronymgeek.com/0420 (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 0420, http://www.acronymgeek.com/0420 (optional description here) (as of Feb. 9, 2012, 14:25). |
| AMA | 0420. Acronym Geek. February 9, 2012, 14:25. Available at: http://www.acronymgeek.com/0420. Accessed February 9, 2012, 14:25. |