| APA | 4GL. (2012, February 11). In Acronym Geek. Retrieved 10:28, February 11, 2012, from http://www.acronymgeek.com/4GL |
| MLA | "4GL." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/4GL>. |
| MHRA | '4GL', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/4GL> [accessed 11 February 2012] |
| Chicago | "4GL", http://www.acronymgeek.com/4GL (accessed February 11, 2012). |
| CBE/CSE | 4GL [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/4GL. |
| Bluebook | 4GL, http://www.acronymgeek.com/4GL (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 4GL, http://www.acronymgeek.com/4GL (optional description here) (as of Feb. 11, 2012, 10:28). |
| AMA | 4GL. Acronym Geek. February 11, 2012, 10:28. Available at: http://www.acronymgeek.com/4GL. Accessed February 11, 2012, 10:28. |