| APA | S/P-DIF. (2012, February 12). In Acronym Geek. Retrieved 13:49, February 12, 2012, from http://www.acronymgeek.com/S/P-DIF |
| MLA | "S/P-DIF." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/S/P-DIF>. |
| MHRA | 'S/P-DIF', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/S/P-DIF> [accessed 12 February 2012] |
| Chicago | "S/P-DIF", http://www.acronymgeek.com/S/P-DIF (accessed February 12, 2012). |
| CBE/CSE | S/P-DIF [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/S/P-DIF. |
| Bluebook | S/P-DIF, http://www.acronymgeek.com/S/P-DIF (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, S/P-DIF, http://www.acronymgeek.com/S/P-DIF (optional description here) (as of Feb. 12, 2012, 13:49). |
| AMA | S/P-DIF. Acronym Geek. February 12, 2012, 13:49. Available at: http://www.acronymgeek.com/S/P-DIF. Accessed February 12, 2012, 13:49. |