| APA | Sig Engineering Change (SEC). (2012, February 14). In Acronym Geek. Retrieved 05:55, February 14, 2012, from http://www.acronymgeek.com/SEC/Sig_Engineering_Change |
| MLA | "Sig Engineering Change (SEC)." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SEC/Sig_Engineering_Change>. |
| MHRA | 'Sig Engineering Change (SEC)', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SEC/Sig_Engineering_Change> [accessed 14 February 2012] |
| Chicago | "Sig Engineering Change (SEC)", http://www.acronymgeek.com/SEC/Sig_Engineering_Change (accessed February 14, 2012). |
| CBE/CSE | Sig Engineering Change (SEC) [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SEC/Sig_Engineering_Change. |
| Bluebook | Sig Engineering Change (SEC), http://www.acronymgeek.com/SEC/Sig_Engineering_Change (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, Sig Engineering Change (SEC), http://www.acronymgeek.com/SEC/Sig_Engineering_Change (optional description here) (as of Feb. 14, 2012, 05:55). |
| AMA | Sig Engineering Change (SEC). Acronym Geek. February 14, 2012, 05:55. Available at: http://www.acronymgeek.com/SEC/Sig_Engineering_Change. Accessed February 14, 2012, 05:55. |