| APA | GPYF. (2012, February 14). In Acronym Geek. Retrieved 17:16, February 14, 2012, from http://www.acronymgeek.com/GPYF |
| MLA | "GPYF." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/GPYF>. |
| MHRA | 'GPYF', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/GPYF> [accessed 14 February 2012] |
| Chicago | "GPYF", http://www.acronymgeek.com/GPYF (accessed February 14, 2012). |
| CBE/CSE | GPYF [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/GPYF. |
| Bluebook | GPYF, http://www.acronymgeek.com/GPYF (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPYF, http://www.acronymgeek.com/GPYF (optional description here) (as of Feb. 14, 2012, 17:16). |
| AMA | GPYF. Acronym Geek. February 14, 2012, 17:16. Available at: http://www.acronymgeek.com/GPYF. Accessed February 14, 2012, 17:16. |