| APA | GPYD. (2012, February 17). In Acronym Geek. Retrieved 07:35, February 17, 2012, from http://www.acronymgeek.com/GPYD |
| MLA | "GPYD." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/GPYD>. |
| MHRA | 'GPYD', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/GPYD> [accessed 17 February 2012] |
| Chicago | "GPYD", http://www.acronymgeek.com/GPYD (accessed February 17, 2012). |
| CBE/CSE | GPYD [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/GPYD. |
| Bluebook | GPYD, http://www.acronymgeek.com/GPYD (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPYD, http://www.acronymgeek.com/GPYD (optional description here) (as of Feb. 17, 2012, 07:35). |
| AMA | GPYD. Acronym Geek. February 17, 2012, 07:35. Available at: http://www.acronymgeek.com/GPYD. Accessed February 17, 2012, 07:35. |