| APA | PPDG. (2012, February 15). In Acronym Geek. Retrieved 23:12, February 15, 2012, from http://www.acronymgeek.com/PPDG |
| MLA | "PPDG." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PPDG>. |
| MHRA | 'PPDG', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PPDG> [accessed 15 February 2012] |
| Chicago | "PPDG", http://www.acronymgeek.com/PPDG (accessed February 15, 2012). |
| CBE/CSE | PPDG [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PPDG. |
| Bluebook | PPDG, http://www.acronymgeek.com/PPDG (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PPDG, http://www.acronymgeek.com/PPDG (optional description here) (as of Feb. 15, 2012, 23:12). |
| AMA | PPDG. Acronym Geek. February 15, 2012, 23:12. Available at: http://www.acronymgeek.com/PPDG. Accessed February 15, 2012, 23:12. |