| APA | HWSI. (2012, February 15). In Acronym Geek. Retrieved 18:02, February 15, 2012, from http://www.acronymgeek.com/HWSI |
| MLA | "HWSI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HWSI>. |
| MHRA | 'HWSI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HWSI> [accessed 15 February 2012] |
| Chicago | "HWSI", http://www.acronymgeek.com/HWSI (accessed February 15, 2012). |
| CBE/CSE | HWSI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HWSI. |
| Bluebook | HWSI, http://www.acronymgeek.com/HWSI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HWSI, http://www.acronymgeek.com/HWSI (optional description here) (as of Feb. 15, 2012, 18:02). |
| AMA | HWSI. Acronym Geek. February 15, 2012, 18:02. Available at: http://www.acronymgeek.com/HWSI. Accessed February 15, 2012, 18:02. |