| APA | GEIA. (2012, February 15). In Acronym Geek. Retrieved 11:49, February 15, 2012, from http://www.acronymgeek.com/GEIA |
| MLA | "GEIA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GEIA>. |
| MHRA | 'GEIA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GEIA> [accessed 15 February 2012] |
| Chicago | "GEIA", http://www.acronymgeek.com/GEIA (accessed February 15, 2012). |
| CBE/CSE | GEIA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GEIA. |
| Bluebook | GEIA, http://www.acronymgeek.com/GEIA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GEIA, http://www.acronymgeek.com/GEIA (optional description here) (as of Feb. 15, 2012, 11:49). |
| AMA | GEIA. Acronym Geek. February 15, 2012, 11:49. Available at: http://www.acronymgeek.com/GEIA. Accessed February 15, 2012, 11:49. |