| APA | ARPA. (2012, February 9). In Acronym Geek. Retrieved 21:22, February 9, 2012, from http://www.acronymgeek.com/ARPA |
| MLA | "ARPA." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/ARPA>. |
| MHRA | 'ARPA', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/ARPA> [accessed 9 February 2012] |
| Chicago | "ARPA", http://www.acronymgeek.com/ARPA (accessed February 9, 2012). |
| CBE/CSE | ARPA [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/ARPA. |
| Bluebook | ARPA, http://www.acronymgeek.com/ARPA (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ARPA, http://www.acronymgeek.com/ARPA (optional description here) (as of Feb. 9, 2012, 21:22). |
| AMA | ARPA. Acronym Geek. February 9, 2012, 21:22. Available at: http://www.acronymgeek.com/ARPA. Accessed February 9, 2012, 21:22. |