| APA | HTPD. (2012, February 10). In Acronym Geek. Retrieved 10:33, February 10, 2012, from http://www.acronymgeek.com/HTPD |
| MLA | "HTPD." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/HTPD>. |
| MHRA | 'HTPD', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/HTPD> [accessed 10 February 2012] |
| Chicago | "HTPD", http://www.acronymgeek.com/HTPD (accessed February 10, 2012). |
| CBE/CSE | HTPD [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/HTPD. |
| Bluebook | HTPD, http://www.acronymgeek.com/HTPD (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HTPD, http://www.acronymgeek.com/HTPD (optional description here) (as of Feb. 10, 2012, 10:33). |
| AMA | HTPD. Acronym Geek. February 10, 2012, 10:33. Available at: http://www.acronymgeek.com/HTPD. Accessed February 10, 2012, 10:33. |