| APA | SPBK. (2012, February 14). In Acronym Geek. Retrieved 14:10, February 14, 2012, from http://www.acronymgeek.com/SPBK |
| MLA | "SPBK." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SPBK>. |
| MHRA | 'SPBK', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SPBK> [accessed 14 February 2012] |
| Chicago | "SPBK", http://www.acronymgeek.com/SPBK (accessed February 14, 2012). |
| CBE/CSE | SPBK [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SPBK. |
| Bluebook | SPBK, http://www.acronymgeek.com/SPBK (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SPBK, http://www.acronymgeek.com/SPBK (optional description here) (as of Feb. 14, 2012, 14:10). |
| AMA | SPBK. Acronym Geek. February 14, 2012, 14:10. Available at: http://www.acronymgeek.com/SPBK. Accessed February 14, 2012, 14:10. |