| APA | APRO. (2012, February 11). In Acronym Geek. Retrieved 20:04, February 11, 2012, from http://www.acronymgeek.com/APRO |
| MLA | "APRO." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/APRO>. |
| MHRA | 'APRO', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/APRO> [accessed 11 February 2012] |
| Chicago | "APRO", http://www.acronymgeek.com/APRO (accessed February 11, 2012). |
| CBE/CSE | APRO [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/APRO. |
| Bluebook | APRO, http://www.acronymgeek.com/APRO (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, APRO, http://www.acronymgeek.com/APRO (optional description here) (as of Feb. 11, 2012, 20:04). |
| AMA | APRO. Acronym Geek. February 11, 2012, 20:04. Available at: http://www.acronymgeek.com/APRO. Accessed February 11, 2012, 20:04. |