| APA | PNDI. (2012, February 16). In Acronym Geek. Retrieved 09:03, February 16, 2012, from http://www.acronymgeek.com/PNDI |
| MLA | "PNDI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PNDI>. |
| MHRA | 'PNDI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PNDI> [accessed 16 February 2012] |
| Chicago | "PNDI", http://www.acronymgeek.com/PNDI (accessed February 16, 2012). |
| CBE/CSE | PNDI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PNDI. |
| Bluebook | PNDI, http://www.acronymgeek.com/PNDI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PNDI, http://www.acronymgeek.com/PNDI (optional description here) (as of Feb. 16, 2012, 09:03). |
| AMA | PNDI. Acronym Geek. February 16, 2012, 09:03. Available at: http://www.acronymgeek.com/PNDI. Accessed February 16, 2012, 09:03. |