| APA | ROEI. (2012, February 15). In Acronym Geek. Retrieved 11:32, February 15, 2012, from http://www.acronymgeek.com/ROEI |
| MLA | "ROEI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ROEI>. |
| MHRA | 'ROEI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ROEI> [accessed 15 February 2012] |
| Chicago | "ROEI", http://www.acronymgeek.com/ROEI (accessed February 15, 2012). |
| CBE/CSE | ROEI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ROEI. |
| Bluebook | ROEI, http://www.acronymgeek.com/ROEI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ROEI, http://www.acronymgeek.com/ROEI (optional description here) (as of Feb. 15, 2012, 11:32). |
| AMA | ROEI. Acronym Geek. February 15, 2012, 11:32. Available at: http://www.acronymgeek.com/ROEI. Accessed February 15, 2012, 11:32. |