| APA | 4M. (2012, February 11). In Acronym Geek. Retrieved 21:55, February 11, 2012, from http://www.acronymgeek.com/4M |
| MLA | "4M." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/4M>. |
| MHRA | '4M', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/4M> [accessed 11 February 2012] |
| Chicago | "4M", http://www.acronymgeek.com/4M (accessed February 11, 2012). |
| CBE/CSE | 4M [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/4M. |
| Bluebook | 4M, http://www.acronymgeek.com/4M (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 4M, http://www.acronymgeek.com/4M (optional description here) (as of Feb. 11, 2012, 21:55). |
| AMA | 4M. Acronym Geek. February 11, 2012, 21:55. Available at: http://www.acronymgeek.com/4M. Accessed February 11, 2012, 21:55. |