| APA | SDIO. (2012, February 15). In Acronym Geek. Retrieved 02:10, February 15, 2012, from http://www.acronymgeek.com/SDIO |
| MLA | "SDIO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/SDIO>. |
| MHRA | 'SDIO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/SDIO> [accessed 15 February 2012] |
| Chicago | "SDIO", http://www.acronymgeek.com/SDIO (accessed February 15, 2012). |
| CBE/CSE | SDIO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/SDIO. |
| Bluebook | SDIO, http://www.acronymgeek.com/SDIO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SDIO, http://www.acronymgeek.com/SDIO (optional description here) (as of Feb. 15, 2012, 02:10). |
| AMA | SDIO. Acronym Geek. February 15, 2012, 02:10. Available at: http://www.acronymgeek.com/SDIO. Accessed February 15, 2012, 02:10. |