| APA | 4GR. (2012, February 11). In Acronym Geek. Retrieved 22:34, February 11, 2012, from http://www.acronymgeek.com/4GR |
| MLA | "4GR." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/4GR>. |
| MHRA | '4GR', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/4GR> [accessed 11 February 2012] |
| Chicago | "4GR", http://www.acronymgeek.com/4GR (accessed February 11, 2012). |
| CBE/CSE | 4GR [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/4GR. |
| Bluebook | 4GR, http://www.acronymgeek.com/4GR (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 4GR, http://www.acronymgeek.com/4GR (optional description here) (as of Feb. 11, 2012, 22:34). |
| AMA | 4GR. Acronym Geek. February 11, 2012, 22:34. Available at: http://www.acronymgeek.com/4GR. Accessed February 11, 2012, 22:34. |