| APA | APDU. (2012, February 17). In Acronym Geek. Retrieved 07:50, February 17, 2012, from http://www.acronymgeek.com/APDU |
| MLA | "APDU." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/APDU>. |
| MHRA | 'APDU', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/APDU> [accessed 17 February 2012] |
| Chicago | "APDU", http://www.acronymgeek.com/APDU (accessed February 17, 2012). |
| CBE/CSE | APDU [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/APDU. |
| Bluebook | APDU, http://www.acronymgeek.com/APDU (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, APDU, http://www.acronymgeek.com/APDU (optional description here) (as of Feb. 17, 2012, 07:50). |
| AMA | APDU. Acronym Geek. February 17, 2012, 07:50. Available at: http://www.acronymgeek.com/APDU. Accessed February 17, 2012, 07:50. |