| APA | OLCH. (2012, February 16). In Acronym Geek. Retrieved 00:20, February 16, 2012, from http://www.acronymgeek.com/OLCH |
| MLA | "OLCH." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OLCH>. |
| MHRA | 'OLCH', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OLCH> [accessed 16 February 2012] |
| Chicago | "OLCH", http://www.acronymgeek.com/OLCH (accessed February 16, 2012). |
| CBE/CSE | OLCH [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OLCH. |
| Bluebook | OLCH, http://www.acronymgeek.com/OLCH (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OLCH, http://www.acronymgeek.com/OLCH (optional description here) (as of Feb. 16, 2012, 00:20). |
| AMA | OLCH. Acronym Geek. February 16, 2012, 00:20. Available at: http://www.acronymgeek.com/OLCH. Accessed February 16, 2012, 00:20. |