| APA | CNG. (2012, February 9). In Acronym Geek. Retrieved 19:25, February 9, 2012, from http://www.acronymgeek.com/CNG |
| MLA | "CNG." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/CNG>. |
| MHRA | 'CNG', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/CNG> [accessed 9 February 2012] |
| Chicago | "CNG", http://www.acronymgeek.com/CNG (accessed February 9, 2012). |
| CBE/CSE | CNG [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/CNG. |
| Bluebook | CNG, http://www.acronymgeek.com/CNG (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CNG, http://www.acronymgeek.com/CNG (optional description here) (as of Feb. 9, 2012, 19:25). |
| AMA | CNG. Acronym Geek. February 9, 2012, 19:25. Available at: http://www.acronymgeek.com/CNG. Accessed February 9, 2012, 19:25. |