| APA | SPBU. (2012, February 15). In Acronym Geek. Retrieved 18:44, February 15, 2012, from http://www.acronymgeek.com/SPBU |
| MLA | "SPBU." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/SPBU>. |
| MHRA | 'SPBU', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/SPBU> [accessed 15 February 2012] |
| Chicago | "SPBU", http://www.acronymgeek.com/SPBU (accessed February 15, 2012). |
| CBE/CSE | SPBU [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/SPBU. |
| Bluebook | SPBU, http://www.acronymgeek.com/SPBU (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SPBU, http://www.acronymgeek.com/SPBU (optional description here) (as of Feb. 15, 2012, 18:44). |
| AMA | SPBU. Acronym Geek. February 15, 2012, 18:44. Available at: http://www.acronymgeek.com/SPBU. Accessed February 15, 2012, 18:44. |