| APA | GRCO. (2012, February 16). In Acronym Geek. Retrieved 03:53, February 16, 2012, from http://www.acronymgeek.com/GRCO |
| MLA | "GRCO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/GRCO>. |
| MHRA | 'GRCO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/GRCO> [accessed 16 February 2012] |
| Chicago | "GRCO", http://www.acronymgeek.com/GRCO (accessed February 16, 2012). |
| CBE/CSE | GRCO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/GRCO. |
| Bluebook | GRCO, http://www.acronymgeek.com/GRCO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GRCO, http://www.acronymgeek.com/GRCO (optional description here) (as of Feb. 16, 2012, 03:53). |
| AMA | GRCO. Acronym Geek. February 16, 2012, 03:53. Available at: http://www.acronymgeek.com/GRCO. Accessed February 16, 2012, 03:53. |