| APA | SOPA. (2012, February 15). In Acronym Geek. Retrieved 18:33, February 15, 2012, from http://www.acronymgeek.com/SOPA |
| MLA | "SOPA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/SOPA>. |
| MHRA | 'SOPA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/SOPA> [accessed 15 February 2012] |
| Chicago | "SOPA", http://www.acronymgeek.com/SOPA (accessed February 15, 2012). |
| CBE/CSE | SOPA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/SOPA. |
| Bluebook | SOPA, http://www.acronymgeek.com/SOPA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SOPA, http://www.acronymgeek.com/SOPA (optional description here) (as of Feb. 15, 2012, 18:33). |
| AMA | SOPA. Acronym Geek. February 15, 2012, 18:33. Available at: http://www.acronymgeek.com/SOPA. Accessed February 15, 2012, 18:33. |