| APA | R2K. (2012, February 14). In Acronym Geek. Retrieved 07:45, February 14, 2012, from http://www.acronymgeek.com/R2K |
| MLA | "R2K." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/R2K>. |
| MHRA | 'R2K', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/R2K> [accessed 14 February 2012] |
| Chicago | "R2K", http://www.acronymgeek.com/R2K (accessed February 14, 2012). |
| CBE/CSE | R2K [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/R2K. |
| Bluebook | R2K, http://www.acronymgeek.com/R2K (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, R2K, http://www.acronymgeek.com/R2K (optional description here) (as of Feb. 14, 2012, 07:45). |
| AMA | R2K. Acronym Geek. February 14, 2012, 07:45. Available at: http://www.acronymgeek.com/R2K. Accessed February 14, 2012, 07:45. |