| APA | ENDO. (2012, February 10). In Acronym Geek. Retrieved 11:52, February 10, 2012, from http://www.acronymgeek.com/ENDO |
| MLA | "ENDO." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/ENDO>. |
| MHRA | 'ENDO', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/ENDO> [accessed 10 February 2012] |
| Chicago | "ENDO", http://www.acronymgeek.com/ENDO (accessed February 10, 2012). |
| CBE/CSE | ENDO [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/ENDO. |
| Bluebook | ENDO, http://www.acronymgeek.com/ENDO (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ENDO, http://www.acronymgeek.com/ENDO (optional description here) (as of Feb. 10, 2012, 11:52). |
| AMA | ENDO. Acronym Geek. February 10, 2012, 11:52. Available at: http://www.acronymgeek.com/ENDO. Accessed February 10, 2012, 11:52. |