| APA | IGOP. (2012, February 17). In Acronym Geek. Retrieved 01:52, February 17, 2012, from http://www.acronymgeek.com/IGOP |
| MLA | "IGOP." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/IGOP>. |
| MHRA | 'IGOP', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/IGOP> [accessed 17 February 2012] |
| Chicago | "IGOP", http://www.acronymgeek.com/IGOP (accessed February 17, 2012). |
| CBE/CSE | IGOP [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/IGOP. |
| Bluebook | IGOP, http://www.acronymgeek.com/IGOP (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IGOP, http://www.acronymgeek.com/IGOP (optional description here) (as of Feb. 17, 2012, 01:52). |
| AMA | IGOP. Acronym Geek. February 17, 2012, 01:52. Available at: http://www.acronymgeek.com/IGOP. Accessed February 17, 2012, 01:52. |