| APA | APS. (2012, February 14). In Acronym Geek. Retrieved 06:34, February 14, 2012, from http://www.acronymgeek.com/APS |
| MLA | "APS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/APS>. |
| MHRA | 'APS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/APS> [accessed 14 February 2012] |
| Chicago | "APS", http://www.acronymgeek.com/APS (accessed February 14, 2012). |
| CBE/CSE | APS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/APS. |
| Bluebook | APS, http://www.acronymgeek.com/APS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, APS, http://www.acronymgeek.com/APS (optional description here) (as of Feb. 14, 2012, 06:34). |
| AMA | APS. Acronym Geek. February 14, 2012, 06:34. Available at: http://www.acronymgeek.com/APS. Accessed February 14, 2012, 06:34. |