| APA | QCA. (2012, February 11). In Acronym Geek. Retrieved 18:09, February 11, 2012, from http://www.acronymgeek.com/QCA |
| MLA | "QCA." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/QCA>. |
| MHRA | 'QCA', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/QCA> [accessed 11 February 2012] |
| Chicago | "QCA", http://www.acronymgeek.com/QCA (accessed February 11, 2012). |
| CBE/CSE | QCA [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/QCA. |
| Bluebook | QCA, http://www.acronymgeek.com/QCA (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QCA, http://www.acronymgeek.com/QCA (optional description here) (as of Feb. 11, 2012, 18:09). |
| AMA | QCA. Acronym Geek. February 11, 2012, 18:09. Available at: http://www.acronymgeek.com/QCA. Accessed February 11, 2012, 18:09. |