| APA | IGFS. (2012, February 15). In Acronym Geek. Retrieved 22:59, February 15, 2012, from http://www.acronymgeek.com/IGFS |
| MLA | "IGFS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/IGFS>. |
| MHRA | 'IGFS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/IGFS> [accessed 15 February 2012] |
| Chicago | "IGFS", http://www.acronymgeek.com/IGFS (accessed February 15, 2012). |
| CBE/CSE | IGFS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/IGFS. |
| Bluebook | IGFS, http://www.acronymgeek.com/IGFS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IGFS, http://www.acronymgeek.com/IGFS (optional description here) (as of Feb. 15, 2012, 22:59). |
| AMA | IGFS. Acronym Geek. February 15, 2012, 22:59. Available at: http://www.acronymgeek.com/IGFS. Accessed February 15, 2012, 22:59. |