| APA | R4A. (2012, February 14). In Acronym Geek. Retrieved 06:38, February 14, 2012, from http://www.acronymgeek.com/R4A |
| MLA | "R4A." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/R4A>. |
| MHRA | 'R4A', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/R4A> [accessed 14 February 2012] |
| Chicago | "R4A", http://www.acronymgeek.com/R4A (accessed February 14, 2012). |
| CBE/CSE | R4A [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/R4A. |
| Bluebook | R4A, http://www.acronymgeek.com/R4A (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, R4A, http://www.acronymgeek.com/R4A (optional description here) (as of Feb. 14, 2012, 06:38). |
| AMA | R4A. Acronym Geek. February 14, 2012, 06:38. Available at: http://www.acronymgeek.com/R4A. Accessed February 14, 2012, 06:38. |