| APA | STK. (2012, February 9). In Acronym Geek. Retrieved 20:07, February 9, 2012, from http://www.acronymgeek.com/STK |
| MLA | "STK." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/STK>. |
| MHRA | 'STK', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/STK> [accessed 9 February 2012] |
| Chicago | "STK", http://www.acronymgeek.com/STK (accessed February 9, 2012). |
| CBE/CSE | STK [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/STK. |
| Bluebook | STK, http://www.acronymgeek.com/STK (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, STK, http://www.acronymgeek.com/STK (optional description here) (as of Feb. 9, 2012, 20:07). |
| AMA | STK. Acronym Geek. February 9, 2012, 20:07. Available at: http://www.acronymgeek.com/STK. Accessed February 9, 2012, 20:07. |