| APA | GPRE. (2012, February 15). In Acronym Geek. Retrieved 16:55, February 15, 2012, from http://www.acronymgeek.com/GPRE |
| MLA | "GPRE." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GPRE>. |
| MHRA | 'GPRE', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GPRE> [accessed 15 February 2012] |
| Chicago | "GPRE", http://www.acronymgeek.com/GPRE (accessed February 15, 2012). |
| CBE/CSE | GPRE [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GPRE. |
| Bluebook | GPRE, http://www.acronymgeek.com/GPRE (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPRE, http://www.acronymgeek.com/GPRE (optional description here) (as of Feb. 15, 2012, 16:55). |
| AMA | GPRE. Acronym Geek. February 15, 2012, 16:55. Available at: http://www.acronymgeek.com/GPRE. Accessed February 15, 2012, 16:55. |