| APA | PGP. (2012, February 4). In Acronym Geek. Retrieved 11:07, February 4, 2012, from http://www.acronymgeek.com/PGP |
| MLA | "PGP." Acronym Geek. (2012). Acronym Geek. 4 Feb 2012 <http://www.acronymgeek.com/PGP>. |
| MHRA | 'PGP', Acronym Geek, 4 February 2012, <http://www.acronymgeek.com/PGP> [accessed 4 February 2012] |
| Chicago | "PGP", http://www.acronymgeek.com/PGP (accessed February 4, 2012). |
| CBE/CSE | PGP [Internet]. Acronym Geek; 2012 Feb 4 [cited 2012 Feb 4]. Available from: http://www.acronymgeek.com/PGP. |
| Bluebook | PGP, http://www.acronymgeek.com/PGP (last visited February 4, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PGP, http://www.acronymgeek.com/PGP (optional description here) (as of Feb. 4, 2012, 11:07). |
| AMA | PGP. Acronym Geek. February 4, 2012, 11:07. Available at: http://www.acronymgeek.com/PGP. Accessed February 4, 2012, 11:07. |