| APA | HTPU. (2012, February 15). In Acronym Geek. Retrieved 12:16, February 15, 2012, from http://www.acronymgeek.com/HTPU |
| MLA | "HTPU." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HTPU>. |
| MHRA | 'HTPU', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HTPU> [accessed 15 February 2012] |
| Chicago | "HTPU", http://www.acronymgeek.com/HTPU (accessed February 15, 2012). |
| CBE/CSE | HTPU [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HTPU. |
| Bluebook | HTPU, http://www.acronymgeek.com/HTPU (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HTPU, http://www.acronymgeek.com/HTPU (optional description here) (as of Feb. 15, 2012, 12:16). |
| AMA | HTPU. Acronym Geek. February 15, 2012, 12:16. Available at: http://www.acronymgeek.com/HTPU. Accessed February 15, 2012, 12:16. |