| APA | ERYO. (2012, February 16). In Acronym Geek. Retrieved 20:14, February 16, 2012, from http://www.acronymgeek.com/ERYO |
| MLA | "ERYO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ERYO>. |
| MHRA | 'ERYO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ERYO> [accessed 16 February 2012] |
| Chicago | "ERYO", http://www.acronymgeek.com/ERYO (accessed February 16, 2012). |
| CBE/CSE | ERYO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ERYO. |
| Bluebook | ERYO, http://www.acronymgeek.com/ERYO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ERYO, http://www.acronymgeek.com/ERYO (optional description here) (as of Feb. 16, 2012, 20:14). |
| AMA | ERYO. Acronym Geek. February 16, 2012, 20:14. Available at: http://www.acronymgeek.com/ERYO. Accessed February 16, 2012, 20:14. |