| APA | CRKR. (2012, February 15). In Acronym Geek. Retrieved 11:05, February 15, 2012, from http://www.acronymgeek.com/CRKR |
| MLA | "CRKR." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/CRKR>. |
| MHRA | 'CRKR', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/CRKR> [accessed 15 February 2012] |
| Chicago | "CRKR", http://www.acronymgeek.com/CRKR (accessed February 15, 2012). |
| CBE/CSE | CRKR [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/CRKR. |
| Bluebook | CRKR, http://www.acronymgeek.com/CRKR (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CRKR, http://www.acronymgeek.com/CRKR (optional description here) (as of Feb. 15, 2012, 11:05). |
| AMA | CRKR. Acronym Geek. February 15, 2012, 11:05. Available at: http://www.acronymgeek.com/CRKR. Accessed February 15, 2012, 11:05. |