| APA | M540. (2012, February 12). In Acronym Geek. Retrieved 05:15, February 12, 2012, from http://www.acronymgeek.com/M540 |
| MLA | "M540." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/M540>. |
| MHRA | 'M540', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/M540> [accessed 12 February 2012] |
| Chicago | "M540", http://www.acronymgeek.com/M540 (accessed February 12, 2012). |
| CBE/CSE | M540 [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/M540. |
| Bluebook | M540, http://www.acronymgeek.com/M540 (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, M540, http://www.acronymgeek.com/M540 (optional description here) (as of Feb. 12, 2012, 05:15). |
| AMA | M540. Acronym Geek. February 12, 2012, 05:15. Available at: http://www.acronymgeek.com/M540. Accessed February 12, 2012, 05:15. |