| APA | PDDL. (2012, February 14). In Acronym Geek. Retrieved 19:05, February 14, 2012, from http://www.acronymgeek.com/PDDL |
| MLA | "PDDL." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PDDL>. |
| MHRA | 'PDDL', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PDDL> [accessed 14 February 2012] |
| Chicago | "PDDL", http://www.acronymgeek.com/PDDL (accessed February 14, 2012). |
| CBE/CSE | PDDL [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PDDL. |
| Bluebook | PDDL, http://www.acronymgeek.com/PDDL (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PDDL, http://www.acronymgeek.com/PDDL (optional description here) (as of Feb. 14, 2012, 19:05). |
| AMA | PDDL. Acronym Geek. February 14, 2012, 19:05. Available at: http://www.acronymgeek.com/PDDL. Accessed February 14, 2012, 19:05. |