| APA | 881. (2012, February 11). In Acronym Geek. Retrieved 22:57, February 11, 2012, from http://www.acronymgeek.com/881 |
| MLA | "881." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/881>. |
| MHRA | '881', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/881> [accessed 11 February 2012] |
| Chicago | "881", http://www.acronymgeek.com/881 (accessed February 11, 2012). |
| CBE/CSE | 881 [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/881. |
| Bluebook | 881, http://www.acronymgeek.com/881 (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 881, http://www.acronymgeek.com/881 (optional description here) (as of Feb. 11, 2012, 22:57). |
| AMA | 881. Acronym Geek. February 11, 2012, 22:57. Available at: http://www.acronymgeek.com/881. Accessed February 11, 2012, 22:57. |