| APA | GYPN. (2012, February 14). In Acronym Geek. Retrieved 08:10, February 14, 2012, from http://www.acronymgeek.com/GYPN |
| MLA | "GYPN." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/GYPN>. |
| MHRA | 'GYPN', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/GYPN> [accessed 14 February 2012] |
| Chicago | "GYPN", http://www.acronymgeek.com/GYPN (accessed February 14, 2012). |
| CBE/CSE | GYPN [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/GYPN. |
| Bluebook | GYPN, http://www.acronymgeek.com/GYPN (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GYPN, http://www.acronymgeek.com/GYPN (optional description here) (as of Feb. 14, 2012, 08:10). |
| AMA | GYPN. Acronym Geek. February 14, 2012, 08:10. Available at: http://www.acronymgeek.com/GYPN. Accessed February 14, 2012, 08:10. |